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Real-time pollen data for Hialeah — updated daily.
Hialeah's tree pollen season begins earlier than most of the country — often in December — because South Florida's tropical climate supports continuous growth with no winter dormancy. Oak is the most significant tree allergen, with live oak and laurel oak producing heavy pollen from January through April. Bald cypress releases substantial pollen from December through February. Australian pine (Casuarina) is one of South Florida's most problematic invasive trees — covering over 372,000 acres statewide — and produces allergenic pollen during both fall and spring seasons, unlike most trees that pollinate once. Juniper and cedar add to the winter tree pollen load. Pine produces highly visible yellow pollen from February through May but is a moderate allergen. Queen palm pollinates year-round in South Florida. Melaleuca, the invasive Australian tea tree that invaded over 488,000 acres of South Florida wetlands, produces pollen during most of the year, though some studies suggest its pollen may have limited allergenicity. Brazilian pepper — the most aggressive invasive tree in Florida, covering 703,500 acres — belongs to the same family as poison ivy and can cause contact dermatitis in addition to producing airborne pollen. Ash, elm, maple, and walnut contribute to the spring pollen load. However, allergists practicing in South Florida have documented that overall pollen counts in the Miami-Dade area are surprisingly low compared to Tallahassee and other Florida regions — often tenfold lower. This means that while tree pollen is present, it may not be the primary driver of allergy symptoms for many Hialeah residents.
Grass pollen is a significant allergen in Hialeah from spring through fall. Bermuda grass and Bahia grass are the dominant allergenic species in South Florida, both thriving in the warm, humid climate. Bermuda grass is ubiquitous in residential lawns, parks, athletic fields, and commercial landscapes throughout Hialeah's densely developed urban environment. Bahia grass is common in less maintained areas and road medians. Unlike northern states where grass pollen has a defined peak and end, South Florida's grasses can pollinate year-round because the climate never produces a killing frost. The wet season from June through October stimulates vigorous grass growth, and mowing throughout the growing season disperses grass pollen at ground level where residents are directly exposed. However, as with tree pollen, certified pollen counting stations in South Florida have documented that grass pollen peak counts are very low compared to some other regions of the country.
Weed pollen season peaks in late summer and fall, with ragweed being the primary trigger from August through October. While ragweed is not as dense in South Florida as in northern states, its pollen travels long distances on wind currents and can affect Hialeah residents even from distant sources. Dog fennel, nettle, and baccharis (saltbush) are present year-round in South Florida, with higher counts generally in fall. The warm climate means weed pollen never fully ceases — low levels persist through winter. However, weed pollen counts, like tree and grass pollen, remain relatively low in the Miami-Dade area compared to other Florida regions.
Mold is the most clinically significant outdoor allergen in Hialeah and across South Florida. Allergists at the Asthma and Allergy Associates of Florida have documented that mold spore counts correlate with emergency room visits for asthma in the region — a relationship not consistently found with pollen. Alternaria, Cladosporium, Aspergillus, and Penicillium are the primary outdoor mold species. South Florida receives 50 to 60 inches of rainfall annually, with the majority falling during intense afternoon thunderstorms from June through October. This constant cycle of rain followed by tropical heat creates ideal conditions for explosive mold growth on every organic surface — leaf litter, soil, building materials, air conditioning systems, and the dense vegetation surrounding Hialeah's residential areas. Hialeah's position near the Everglades amplifies mold exposure: the Biscayne Aquifer sits just feet below the porous Miami Limestone surface, maintaining chronic ground-level moisture that sustains mold colonies even during the drier winter months. The extensive canal network running through and around Hialeah — including the Miami Canal — creates additional moisture corridors where mold thrives.
Indoor allergens may be the most important factor for many Hialeah allergy sufferers. South Florida allergists have noted that because outdoor pollen counts are relatively low compared to other regions, indoor allergen exposure — dust mites, indoor mold, and pet dander — is probably the more important trigger for many patients. South Florida is home to Blomia tropicalis, a tropical dust mite species not commonly found elsewhere in the continental United States. Standard allergy testing panels include Dermatophagoides pteronyssinus and Dermatophagoides farinae, but Blomia tropicalis requires specific testing and is a significant sensitizer in subtropical regions. All three species thrive in Hialeah's warm, humid indoor environments. Air conditioning — essential in Hialeah's tropical climate — creates condensation that promotes indoor mold growth in ductwork, drip pans, and around units. Cockroach allergen is also significant in South Florida's urban environments and is a known asthma trigger. Pet dander from cats and dogs remains a perennial indoor allergen.
Severity: Low to Moderate
South Florida's allergy year begins with tree pollen in December, earlier than anywhere else in the eastern United States. Bald cypress and juniper start the season, followed by oak catkins becoming visible by January. Australian pine releases pollen during this period. The dry season — November through April — reduces but does not eliminate mold, because the shallow Biscayne Aquifer maintains ground moisture and the canal network sustains humidity. Indoor allergens become more significant as residents spend time in climate-controlled environments. Dust mites, including the tropical species Blomia tropicalis, thrive year-round. This is actually one of the better periods for outdoor allergy sufferers in Hialeah, and the ideal window to begin allergy treatment before the wet season mold surge.
Severity: Moderate to High
Spring is Hialeah's peak tree pollen season. Oak pollen reaches its highest levels from March through April — live oak and laurel oak are the primary triggers. Pine produces visible yellow pollen. Ash, elm, and maple contribute. Grass pollen begins rising in April as Bermuda and Bahia grass respond to increasing warmth and lengthening days. Late May marks the transition to the wet season, with afternoon thunderstorms becoming regular. These storms temporarily wash pollen from the air but immediately stimulate mold growth. The combination of residual tree pollen, rising grass pollen, and increasing mold creates the first multi-allergen overlap period. For residents sensitive to both pollen and mold, this transition period can be particularly challenging.
Severity: High to Severe
The wet season is Hialeah's most challenging allergy period, driven primarily by mold. Afternoon thunderstorms deposit 1 to 3 inches of rain several times per week, followed by intense tropical heat that promotes explosive mold growth. South Florida allergists have documented that mold spore counts during this period correlate with emergency room visits for asthma. Grass pollen peaks in June and July with Bermuda and Bahia grass. Ragweed begins in August, overlapping with peak mold. Humidity regularly exceeds 80 percent, and the heat index can reach 110°F, driving residents indoors where dust mites and indoor mold exposure increases. Air conditioning systems run continuously, and any moisture accumulation in ductwork or around units promotes indoor mold colonies. The hurricane season (June through November) adds additional risk — tropical storms and hurricanes bring flooding that saturates buildings and creates severe mold problems that can persist for months after the water recedes.
Severity: Moderate
Fall brings the peak of ragweed season through October, along with dog fennel, nettle, and baccharis. The wet season begins tapering, with fewer afternoon thunderstorms and gradually decreasing humidity. However, the accumulated moisture from months of summer rain means mold remains elevated through November. Fall is peak mold season in Florida because damp leaves, high humidity, and frequent late-season rain create ideal breeding conditions for both outdoor and indoor mold. Australian pine releases its second pollen season in fall. Indoor allergens remain significant. By late November, the transition to the dry season begins providing gradual relief, though Hialeah's tropical climate never produces the hard freeze that would truly end any allergy season. For many residents, fall is a time to evaluate allergy management strategies before the next annual cycle.
Hialeah sits in northwest Miami-Dade County at the threshold of the Everglades — Water Conservation Area 3B lies just miles to the west. The Biscayne Aquifer, which supplies drinking water to over 3 million South Floridians, sits mere feet below the porous Miami Limestone surface beneath your home. This shallow water table maintains chronic ground-level moisture that sustains mold colonies even during the drier winter months. The extensive canal network — including the Miami Canal running through the area — adds surface water corridors that elevate humidity in adjacent neighborhoods. If you live near a canal or in a low-lying area of Hialeah, your mold exposure is likely higher than average. Run dehumidifiers to keep indoor humidity below 50 percent, and have HVAC systems professionally inspected for mold growth in ductwork and drip pans at least twice yearly.
South Florida allergists have documented a counterintuitive finding: pollen counts in Miami-Dade are surprisingly low — often tenfold lower than Tallahassee and Sarasota. But mold spore counts correlate with emergency room visits for asthma. If standard antihistamines aren't providing relief during the wet season (June through September), mold sensitivity — not pollen — is likely driving your symptoms. Mold-specific treatment differs from pollen allergy management. A blood allergy test can identify whether you're sensitized to Alternaria, Cladosporium, Aspergillus, or Penicillium molds and allow targeted treatment. After any flooding event — from afternoon thunderstorms, tropical storms, or hurricanes — inspect for standing water and saturated materials that will become mold sources within 24 to 48 hours.
South Florida is home to Blomia tropicalis, a tropical dust mite species not found in most of the continental United States. Standard allergy panels test for the common dust mites Dermatophagoides pteronyssinus and D. farinae, but may not include Blomia tropicalis. If your allergy test shows negative for standard dust mites but you have year-round indoor symptoms — morning congestion, nighttime coughing, itchy eyes at home — ask your allergist about testing for Blomia tropicalis specifically. All three species thrive in Hialeah's warm, humid indoor environments. Use allergen-proof mattress and pillow encasements, wash bedding weekly in hot water, and maintain indoor humidity below 50 percent with dehumidifiers.
In Hialeah's tropical climate, air conditioning isn't optional — but it's also a major source of indoor mold and allergen circulation. AC systems create condensation that accumulates in drip pans, ductwork, and around the unit itself. In South Florida's humidity, this moisture promotes mold growth inside the system that then gets distributed throughout your home every time the unit runs. Change HVAC filters monthly during the wet season (June through October), have ductwork professionally cleaned annually, ensure drip pans drain properly, and consider upgrading to HEPA-rated filtration. If you notice a musty smell when the AC starts, that's mold in the system actively dispersing spores into your living space.
Hialeah's landscape includes invasive trees that create unique allergy challenges. Brazilian pepper — the most aggressive invasive in Florida at over 703,000 acres — belongs to the same family as poison ivy and causes contact dermatitis in sensitized individuals. If you develop itchy, blistering skin rashes after outdoor activity, Brazilian pepper exposure may be the cause. Australian pine (Casuarina) produces allergenic pollen during both fall and spring seasons. Melaleuca produces pollen year-round. These invasive species are present in vacant lots, canal banks, and unmaintained areas throughout Hialeah. If you develop skin reactions after gardening or yard work, consider whether contact with Brazilian pepper is involved — this is distinct from airborne pollen allergy and requires different management.
HeyAllergy offers telemedicine appointments with board-certified allergists and immunologists licensed in Florida. Book a virtual consultation from home in Hialeah, have allergy blood tests ordered at a convenient local lab, and receive a personalized treatment plan based on your specific triggers — including testing for tropical allergens like Blomia tropicalis. HeyPak sublingual immunotherapy drops ship directly to your door and treat the root cause of allergies by building tolerance to the specific allergens driving your symptoms — whether mold, dust mites, oak, grass, ragweed, or pet dander. In a city where Everglades moisture, a shallow aquifer, tropical humidity, and year-round allergen exposure converge, treating the underlying allergic sensitivity is the most effective path to lasting relief. Most patients notice improvement within 3 to 6 months. Starting at $47 per month.
June through September is the worst period, driven primarily by mold spores that peak during the wet season's cycle of afternoon thunderstorms and tropical heat. South Florida allergists have documented that mold spore counts correlate with emergency room visits for asthma during these months. Tree pollen peaks March through April, and ragweed peaks August through October, creating multi-allergen overlap in late summer.
The most common allergens are mold spores (Alternaria, Cladosporium, Aspergillus), dust mites (including the tropical species Blomia tropicalis), oak, Bermuda grass, Bahia grass, ragweed, Australian pine, cockroach allergen, and pet dander. South Florida allergists note that indoor allergens and mold are likely more important than pollen for many patients, because pollen counts in Miami-Dade are surprisingly low compared to other Florida regions.
Yes. Certified pollen counting studies in South Florida show that total pollen counts are often tenfold lower than Tallahassee and Sarasota. But mold spore counts correlate with emergency room asthma visits. The Biscayne Aquifer sits just feet below porous limestone, maintaining chronic moisture. Annual rainfall of 50 to 60 inches, mostly during intense summer storms, creates ideal mold conditions year-round.
Blomia tropicalis is a tropical dust mite species found in South Florida but not in most of the continental United States. Standard allergy panels may not include it. If you have year-round indoor symptoms that don't respond to standard dust mite treatment, ask your allergist about Blomia tropicalis testing. HeyAllergy's board-certified allergists are familiar with tropical allergens specific to South Florida.
Yes. HeyAllergy provides telemedicine appointments with board-certified allergists and immunologists licensed in Florida. Book a virtual consultation from anywhere in the state, have allergy blood tests ordered at a local lab, and start a personalized treatment plan without visiting a clinic. No referral needed and no waitlist.
HeyPak sublingual immunotherapy uses customized liquid drops placed under your tongue daily containing precise doses of the specific allergens triggering your symptoms — whether mold, dust mites, oak, grass, ragweed, or pet dander. Over time, your immune system builds tolerance, reducing allergic reactions and medication dependence. Most patients notice improvement within 3 to 6 months.
HeyAllergy accepts Medicare and most major PPO health plans, including United Healthcare, Anthem Blue Cross, Blue Shield, Cigna, Aetna, Humana, Oscar, and Tricare. Contact your insurance provider with Tax ID: 85-0834175 to confirm your specific telemedicine coverage.
Yes. South Florida's tropical climate produces no killing frost and no winter dormancy. Tree pollen runs December through April, grass pollen April through October, weed pollen August through November, and mold spores are present year-round with a dramatic peak during the June-through-September wet season. Indoor allergens — dust mites, indoor mold, cockroach allergen, and pet dander — are continuous.
Hialeah, Florida — population approximately 225,000 — occupies a unique position in northwest Miami-Dade County where the densely developed urban corridor meets the edge of the Everglades ecosystem. Water Conservation Area 3B, one of the managed remnants of the original Everglades, lies just miles to the west. The city sits atop the Biscayne Aquifer, a shallow, unconfined aquifer formed in the highly porous and permeable Miami Limestone that supplies drinking water to over 3 million South Floridians. This geological foundation has profound implications for allergy sufferers: the water table sits mere feet below the land surface, and the porous limestone allows water levels to rise rapidly in response to rainfall. USGS records show that in the catastrophic flooding of 1947, water levels in Hialeah rose to nearly 9 feet above sea level. Even under normal conditions, this shallow water table maintains chronic ground-level moisture that sustains mold colonies throughout the year — creating the foundation for South Florida's mold-dominant allergen profile.
Hialeah's landscape is crisscrossed by drainage canals that are part of the massive Central and Southern Florida Flood Control system — over 1,400 miles of canals, levees, and water control structures built to manage the flow of water that originally moved as a slow, shallow sheet from Lake Okeechobee through the Everglades to the coast. The Miami Canal, completed in 1913, was one of the first major drainage canals and runs through the Hialeah area. The Hialeah-Miami Springs Well Field draws water from the Biscayne Aquifer and is a major influence on local water table levels. These canals are described by USGS hydrologists as extremely leaky — they both receive groundwater seepage from the aquifer and recharge the aquifer from canal water. For allergy sufferers, this network of open water channels running through residential neighborhoods creates continuous moisture corridors where mold thrives on canal banks, adjacent vegetation, and in the humid air above the water surface. Homes and buildings near canals face elevated mold exposure compared to those on higher ground farther from waterways.
One of the most counterintuitive findings from South Florida allergists is that pollen counts in the Miami-Dade area are surprisingly low — often tenfold lower than Tallahassee and Sarasota. This means that many Hialeah residents experiencing chronic allergy symptoms may be misattributing their suffering to pollen when mold is actually the primary trigger. Allergists at the Asthma and Allergy Associates of Florida conducted multi-year pollen counting studies that revealed this pattern: while pollen is present year-round, its clinical significance in South Florida is overshadowed by mold. Their research documented that mold spore counts correlate with emergency room visits for asthma — a direct link between airborne mold and acute respiratory crisis. The implications for Hialeah residents are significant: standard over-the-counter antihistamines designed primarily for pollen allergies may not adequately address mold sensitivity. Mold allergy requires specific diagnosis through blood testing and targeted treatment approaches, including environmental remediation and allergen immunotherapy.
South Florida harbors Blomia tropicalis, a tropical dust mite species that is not commonly found elsewhere in the continental United States. Standard allergy testing panels typically include Dermatophagoides pteronyssinus and Dermatophagoides farinae — the common house dust mites found throughout North America. But Blomia tropicalis is a significant sensitizer in subtropical and tropical regions, and patients in Hialeah may be sensitized to this species without knowing it. All three dust mite species thrive in the warm, humid indoor environments characteristic of Hialeah homes. The combination of high ambient humidity, air conditioning condensation, and the dense residential development that characterizes Hialeah creates ideal conditions for dust mite populations. Mattresses, upholstered furniture, carpeting, and curtains harbor these microscopic organisms, and their waste products trigger allergic rhinitis, asthma, and eczema in sensitized individuals. Because standard allergy panels may not test for Blomia tropicalis, Hialeah residents with persistent indoor symptoms despite standard treatment should specifically request testing for this tropical species.
Hialeah's urban landscape includes invasive tree species that add unique dimensions to the allergy challenge. Australian pine (Casuarina) has covered over 372,000 acres of Florida and produces allergenic pollen during both fall and spring — an unusual double season that extends exposure windows. Its fallen needles release chemicals into the soil that inhibit native plant growth, altering the landscape. Melaleuca, the invasive Australian tea tree, invaded over 488,000 acres of South Florida at its peak — more than 12 percent of total land area — before aggressive control programs brought it under management. It produces pollen during most of the year. Brazilian pepper is the most aggressive invasive tree in Florida at over 703,000 acres, and presents a dual allergy threat: as a member of the Anacardiaceae family alongside poison ivy and poison oak, it causes contact dermatitis with itchy, blistering skin rashes, while also producing airborne pollen. These invasive species persist in vacant lots, canal banks, and unmaintained areas throughout Hialeah's urban fabric, creating localized allergen sources that residents may not recognize.
South Florida's wet season from June through October defines the allergy year in Hialeah. Annual rainfall of 50 to 60 inches falls primarily as intense afternoon thunderstorms during these months. Each storm temporarily washes pollen from the air but immediately creates the warm, wet conditions that promote explosive mold growth. The cycle repeats daily: rain, tropical heat, mold production, rain again. Humidity regularly exceeds 80 percent, and the combination of heat and humidity drives residents indoors where dust mites, indoor mold, and cockroach allergen exposure increases. Air conditioning systems running continuously create condensation in ductwork and drip pans that becomes another mold source. The hurricane season (June through November) adds catastrophic risk — flooding from tropical storms saturates building materials and creates severe mold infestations that can persist for months. The wet season's impact is compounded by the Everglades proximity and shallow water table that prevent the ground from ever fully drying, maintaining the moisture foundation for chronic mold exposure throughout Hialeah.
Unlike most of the United States, Hialeah's tropical climate produces no killing frost and no period of plant dormancy. Tree pollen begins in December, peaks March through April, and persists through May. Grass pollen runs from April through October. Weed pollen peaks August through November. Mold spores are present continuously, with dramatic peaks during the wet season. Indoor allergens — dust mites, indoor mold, cockroach, and pet dander — are constant year-round. There is no season when allergen exposure drops to zero. This continuous exposure makes allergy management in Hialeah a chronic challenge requiring ongoing treatment rather than seasonal medication. The best relief window is the dry season from November through February, when mold levels decrease somewhat and tree pollen has not yet peaked — but even during these months, indoor allergens and residual outdoor mold ensure some exposure continues.
HeyAllergy's telemedicine platform connects Hialeah residents to board-certified allergists and immunologists licensed in Florida — providing expert allergy care from the comfort of home. A virtual consultation eliminates waiting rooms and scheduling delays. Allergy blood tests are ordered at a convenient local lab, and a personalized treatment plan is developed based on your specific triggers — including tropical allergens like Blomia tropicalis that standard testing may miss. HeyPak sublingual immunotherapy drops ship directly to your door and treat the root cause of allergies by building your immune system's tolerance to the specific allergens driving your symptoms — whether mold, dust mites, oak, grass, ragweed, or pet dander. In a city where Everglades moisture, a shallow aquifer beneath porous limestone, tropical humidity, and year-round allergen exposure converge, treating the underlying allergic sensitivity is the most effective path to lasting relief. HeyAllergy accepts Medicare and most major PPO health plans. Starting at $47 per month for HeyPak drops, with most patients noticing improvement within 3 to 6 months.
