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Real-time pollen data for Corpus Christi — updated daily.
Live oak is the dominant tree allergen in the Corpus Christi area and one of the most visible allergens in all of Texas. During peak season in March and April, live oak pollen coats cars, pets, sidewalks, patio furniture, and every outdoor surface in a fine yellow powder that is impossible to ignore. Live oaks are deeply woven into the Coastal Bend landscape — lining streets, filling parks, and shading neighborhoods across the city. Hackberry is the second most significant tree allergen in the area, producing substantial pollen loads in spring. Ash trees are early-season pollinators, beginning in January and continuing through March. Elm trees pollinate in late winter and early spring. Pecan and hickory trees are significant allergens throughout South Texas, with pecan particularly widespread in the Coastal Bend region. Mesquite, a quintessential South Texas tree, produces pollen in spring. Pine contributes visible but less allergenic pollen. Mountain cedar (Ashe juniper) pollen is not native to the Corpus Christi area, but cold fronts regularly carry mountain cedar pollen from the Texas Hill Country — roughly 150 miles to the northwest — down to the Coastal Bend during winter months. When north winds blow after cold front passages, cedar pollen counts in Corpus Christi can spike significantly despite the absence of local cedar trees. This makes Corpus Christi one of the few coastal cities in the country affected by an inland allergen transported by weather patterns.
Grass pollen season in Corpus Christi is extraordinarily long due to the subtropical climate. Bermuda grass is the dominant grass allergen, thriving in the heat and humidity and present in residential lawns, parks, athletic fields, and open spaces throughout the city. Johnson grass is common in disturbed soils, roadsides, and undeveloped areas across the Coastal Bend. Bahia grass is prevalent in the region. Big bluestem and broomsedge are native grasses that contribute pollen. The warm growing season means grass actively produces pollen from March through November in most years — a season roughly twice as long as northern states. Corpus Christi rarely experiences hard freezes, so grass growth and pollination continue far later into fall and restart far earlier in spring than inland Texas cities.
Ragweed is the worst fall allergen in the Corpus Christi area. A single ragweed plant can produce up to one billion pollen grains in a single season, and the Coastal Bend's warm fall weather extends ragweed pollination well into November and sometimes beyond if no freeze arrives. Ragweed peaks in October and begins to lessen in November in typical years. Pigweed and lamb's quarters grow in disturbed soils and construction areas. Russian thistle produces allergenic pollen. Marsh elder is present in coastal and low-lying areas. Dock and sorrel contribute additional weed pollen. The absence of consistent hard freezes means weed pollen season often extends later than the calendar would suggest — the timing of the first significant cold front determines when fall weed pollen finally subsides.
Mold is arguably the most persistent and underappreciated allergen in Corpus Christi. The city's Gulf Coast location creates chronically high humidity levels that are ideal for mold growth. Outdoor mold species including Alternaria, Cladosporium, Aspergillus, and Penicillium thrive in the warm, moist environment and release spores year-round. Mold counts spike after rain events during the wet season (April–October), and the warm conditions following rainfall create explosive mold growth. Unlike pollen, which has defined seasons, mold in Corpus Christi is a constant presence. The wet season produces particularly high mold spore counts. Indoor mold grows readily in bathrooms, air conditioning systems, and any area where moisture accumulates — a serious concern in a climate where air conditioning runs nearly year-round. Dust mites thrive in the humidity and are active in every season. Cockroach allergens are significant in the warm subtropical climate, as several cockroach species thrive in South Texas. Pet dander contributes to indoor exposure. The combination of year-round mold, persistent dust mites, and cockroach allergens means indoor allergen exposure in Corpus Christi is among the highest in the state.
Severity: Moderate to High
Winter in Corpus Christi is unlike winter anywhere in the northern United States. Freezes are rare and brief, so plants never fully enter dormancy. The most distinctive winter allergen is mountain cedar pollen, which does not grow locally but drifts into the Coastal Bend from the Texas Hill Country when cold fronts push north winds through the region. Cedar pollen counts can spike significantly on days following cold front passages, causing cedar fever symptoms in Corpus Christi residents who may not realize the pollen is traveling 150+ miles to reach them. Ash and elm trees begin pollinating in January. By February, live oak and hackberry pollen are beginning to rise. Mold remains active year-round in the Gulf Coast humidity. The wet-to-dry season transition means lower rainfall during these months, but humidity remains high enough to sustain mold growth. Indoor allergens — dust mites, pet dander, cockroach allergens — intensify as residents spend more time indoors during the occasional cool spells.
Severity: High to Severe
March through May is the most intense pollen period in Corpus Christi. Live oak pollen dominates and is the most visually dramatic allergen in the Coastal Bend — a fine yellow powder coats every outdoor surface in the city during peak weeks in March and April. Hackberry, pecan, mesquite, and other trees add overlapping pollen waves. Grass pollen begins in March, overlapping with late tree pollen and creating weeks of simultaneous multi-allergen exposure. The transition from dry season to wet season typically begins in April, and the first significant spring rains can temporarily wash pollen from the air but also trigger explosive mold growth. Agricultural burns in Mexico during spring can send particulate matter and smoke northward into the Coastal Bend, adding an additional respiratory irritant on top of the pollen burden. Coastal winds can carry allergens from various inland sources, increasing exposure on windy days.
Severity: Moderate to High
Summer shifts the allergen profile from tree pollen to grass pollen, mold, and increasingly intense humidity. Bermuda grass, Johnson grass, and Bahia grass continue producing heavy pollen loads. The wet season is fully underway, with frequent afternoon thunderstorms creating cycles of moisture that drive mold spore counts to their highest levels of the year. Warm conditions following rain create ideal mold growth environments. Humidity regularly exceeds 80–90 percent, and the combination of heat and moisture keeps dust mites thriving. Indoor allergens peak during summer as homes remain sealed with air conditioning running continuously — and air conditioning systems themselves can harbor mold if not properly maintained. Atlantic hurricane season runs June through November, and tropical storms and hurricanes can create catastrophic mold conditions in their aftermath as floodwaters, damaged structures, and saturated building materials provide explosive mold growth environments.
Severity: Moderate to High
Fall brings ragweed as the dominant allergen, peaking in October and often persisting into November or even December if no hard freeze arrives. Grass pollen continues well into fall — the subtropical climate keeps grass actively pollinating through November in many years. Mold remains elevated during the tail end of the wet season. The timing of the first significant cold front determines when fall allergens finally subside, and in Corpus Christi, that timing is unpredictable — some years the first meaningful freeze doesn't arrive until January. Weed pollen from pigweed, marsh elder, and other species adds to the ragweed burden. November typically brings decreasing pollen counts as cooler air finally arrives, but even the fall "relief" period is brief before mountain cedar pollen begins drifting from the Hill Country in December, restarting the cycle.
One of the most confusing allergen experiences for Corpus Christi residents is developing cedar fever symptoms despite the absence of mountain cedar trees in the Coastal Bend. Mountain cedar (Ashe juniper) grows primarily in the Texas Hill Country, roughly 150 miles to the northwest. But when cold fronts push through Texas, the accompanying north winds carry massive quantities of cedar pollen southward into the Coastal Bend. Cedar pollen counts in Corpus Christi can spike significantly on days following cold front passages during the December–February cedar season. If you develop intense congestion, sore throat, fatigue, and facial pressure during winter — particularly the day after a cold front passes — mountain cedar pollen transported by the weather system is the most likely cause. Tracking Hill Country cedar counts and cold front timing helps predict when cedar pollen will arrive at the coast.
While most allergy discussions focus on pollen, mold may be the most persistent and impactful allergen in Corpus Christi. The city's Gulf Coast location creates chronically high humidity that sustains mold growth twelve months a year. Outdoor mold species like Alternaria and Cladosporium thrive in every season. Mold counts spike dramatically after rain events, especially during the wet season (April–October) when warm conditions following rainfall create explosive mold growth. The cycle of rain and warmth that defines Corpus Christi's summer is essentially a continuous mold production cycle. Indoor mold is equally problematic — air conditioning systems that run nearly year-round can harbor mold growth if not regularly maintained, and the high ambient humidity makes bathrooms, kitchens, and any area with moisture accumulation potential mold breeding grounds. Address mold proactively: service your HVAC system, use dehumidifiers if indoor humidity exceeds 50 percent, and clean visible mold promptly.
Corpus Christi's proximity to the Mexican border introduces an allergen source that few other US cities face. Springtime agricultural burns in Mexico can send particulate matter and smoke northward across the border and into the Coastal Bend region, adding a respiratory irritant that compounds the already-heavy spring pollen burden. These burn events are unpredictable and can persist for days. The particulate matter from agricultural smoke irritates airways independently and can amplify allergic reactions to the tree and grass pollen already present. If your spring allergy symptoms seem unusually intense or include a burning sensation in your airways that pollen alone doesn't typically cause, agricultural smoke from Mexico may be a contributing factor. Monitor air quality forecasts during spring months, particularly when winds are from the south or southwest.
Corpus Christi's climate follows a distinctive wet season (April–October) and dry season (November–March) cycle that directly shapes the allergen landscape. The wet season brings frequent rainfall that temporarily washes pollen from the air but triggers explosive mold growth in the warm, moist conditions that follow rain. The dry season reduces mold somewhat but allows pollen to disperse more efficiently in the dry, windy air. Understanding this cycle helps with planning: during wet season, expect mold to be your primary nemesis; during dry season, wind-dispersed pollen (including mountain cedar from the Hill Country) becomes the dominant concern. Neither season offers true allergen relief — the burden simply shifts from one type to another.
Most of the country gets a winter reprieve when hard freezes shut down pollen production and kill exposed mold. Corpus Christi rarely freezes. In many years, the city records zero freezing days, and even in colder years, freezes are brief and mild. This means grass can continue growing and pollinating well into November or December, ragweed persists until a meaningful cold front finally arrives, mold never encounters temperatures cold enough to significantly reduce it, and the tree pollen season restarts as early as January. The timing of the first significant cold front each fall determines how long the weed and grass pollen season extends, and in warm years, that first front may not arrive until late December or even January. If you relocated to Corpus Christi from a northern state where winter meant complete allergy relief, the subtropical climate's near-continuous allergen cycle is a significant adjustment.
HeyAllergy offers telemedicine appointments with board-certified allergists and immunologists licensed in Texas. Book a virtual consultation from your home in Corpus Christi, Portland, Robstown, Rockport, Port Aransas, or anywhere in the Coastal Bend. Have allergy blood tests ordered at a convenient local lab and receive a personalized treatment plan. HeyPak sublingual immunotherapy drops ship directly to your door and treat the root cause of allergies by building tolerance to your specific Coastal Bend triggers — from live oak and Bermuda grass to ragweed, mountain cedar, mold, and dust mites. In a subtropical climate where allergens cycle continuously and mold never takes a break, treating the underlying cause offers lasting relief that seasonal medications alone cannot sustain.
March and April are typically the worst months for allergies in Corpus Christi, when live oak pollen peaks and coats outdoor surfaces in visible yellow powder while grass pollen simultaneously begins. October is the peak for ragweed. January through February can bring mountain cedar pollen drifting from the Hill Country via cold fronts. Mold is elevated year-round due to Gulf Coast humidity.
The most common allergens in Corpus Christi are live oak, hackberry, Bermuda grass, ragweed, mold (Alternaria, Cladosporium), dust mites, and mountain cedar (transported from the Hill Country). Live oak is the most visible tree allergen. Mold is the most persistent year-round allergen due to Gulf Coast humidity. A blood allergy test identifies your specific triggers across the full range of Coastal Bend allergens.
Mountain cedar (Ashe juniper) does not grow in the Coastal Bend, but cold fronts regularly carry cedar pollen from the Texas Hill Country — roughly 150 miles northwest — into Corpus Christi during December through February. North winds following cold front passages transport massive quantities of cedar pollen southward. Cedar fever symptoms can spike in Corpus Christi the day after a cold front passes despite no local cedar trees.
Yes. HeyAllergy provides telemedicine appointments with board-certified allergists and immunologists licensed in Texas. Book a virtual consultation from anywhere in the state, have allergy blood tests ordered at a lab near you, 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. The drops contain precise doses of the specific allergens triggering your symptoms — whether live oak, Bermuda grass, ragweed, mountain cedar, mold, or dust mites. 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, Health Net, Anthem Blue Cross, Anthem Blue Cross Blue Shield, Blue Shield, Cigna, Aetna, Humana, Oscar, and Tricare. Contact your insurance provider with Tax ID: 85-0834175 to confirm your specific telemedicine coverage.
Yes. Corpus Christi's subtropical climate with rare freezes means allergens cycle nearly continuously. Tree pollen runs February through May, grass pollen covers March through November, ragweed fills August through November, and mountain cedar arrives December through February via cold fronts. Mold is active every month due to Gulf Coast humidity. There is no extended allergen-free period in the Coastal Bend.
HeyAllergy offers fast scheduling with no waitlist. Book a telemedicine appointment with a board-certified allergist and connect from home using your phone, tablet, or computer. Corpus Christi and Coastal Bend residents can access specialist care immediately without waiting weeks for a local opening.
Corpus Christi, Texas, sits on the western shore of Corpus Christi Bay along the Gulf of Mexico, home to approximately 325,000 residents in one of the southernmost major cities in the United States. Known as the "Sparkling City by the Sea," Corpus Christi offers a coastal lifestyle defined by the beach, fishing, water sports, and mild winters that attract new residents from across the country. But the same subtropical climate that makes the city attractive also creates one of the most complex and persistent allergen environments in Texas. The Gulf Coast humidity that hangs over the city sustains year-round mold growth. The subtropical temperatures that keep winters mild also prevent the hard freezes that shut down pollen production in most of the country. And the Coastal Bend's geographic position means Corpus Christi receives allergens not just from local sources but from the Texas Hill Country via cold fronts and from Mexico via agricultural burns — creating a truly multi-directional allergen exposure that few other cities experience.
Corpus Christi's defining environmental characteristic for allergy sufferers is its persistent Gulf Coast humidity. Average humidity levels regularly exceed 80 percent, and the warm, moist conditions create an environment where mold never truly stops growing. Outdoor mold species including Alternaria, Cladosporium, Aspergillus, and Penicillium release spores in every season. The city's climate follows a wet season (April–October) and dry season (November–March) cycle, and while the dry season brings some reduction in mold, the Gulf proximity maintains enough moisture to keep mold active even during the driest months. During the wet season, frequent afternoon thunderstorms followed by warm temperatures create explosive mold growth conditions — the cycle of rain and heat essentially functions as a continuous mold production system. Indoor mold is equally problematic. Air conditioning systems run nearly year-round in Corpus Christi, and without regular maintenance, they can harbor significant mold colonies that distribute spores throughout the home. The high ambient humidity means bathrooms, kitchens, and any area where moisture accumulates can develop mold rapidly. For many Corpus Christi residents, mold is a more persistent and impactful allergen than any seasonal pollen.
One of the most distinctive features of Corpus Christi's allergy landscape is its vulnerability to mountain cedar pollen despite the absence of mountain cedar trees in the Coastal Bend. Mountain cedar (Ashe juniper) grows primarily in the Texas Hill Country, approximately 150 miles to the northwest. During the cedar pollen season from December through February, cold fronts sweeping across Texas carry north winds that transport massive quantities of cedar pollen southward. When these cold fronts reach the Coastal Bend, cedar pollen counts in Corpus Christi can spike significantly — an experience that confuses many residents who develop intense congestion, sore throat, fatigue, and facial pressure during winter without understanding the distant source. Cedar fever is one of the most potent allergic reactions in Texas, and Corpus Christi is far enough south that many newcomers don't expect to encounter it. But the meteorological connection between Hill Country cedar and Coastal Bend cold fronts means that monitoring cold front timing and Hill Country pollen counts can help predict when cedar pollen will arrive at the coast.
Corpus Christi's relative proximity to the Mexican border introduces an allergen source that most US cities don't face. During spring months, agricultural burns in Mexico can send smoke and particulate matter northward across the border, reaching the Coastal Bend and adding a respiratory irritant that compounds the spring pollen burden. These burn events are driven by agricultural clearing practices and can persist for days when wind patterns carry the smoke toward South Texas. The particulate matter from agricultural fires irritates airways independently and can amplify the body's allergic response to the tree and grass pollen already present in the air. This cross-border factor means Corpus Christi's spring allergy season is influenced by international agricultural activity — a variable that local pollen forecasts don't typically capture and that residents may not associate with their respiratory symptoms.
Corpus Christi's subtropical climate is defined by mild winters, hot and humid summers, and an absence of the sustained cold that shuts down allergen production in most of the country. Many years, the city records zero freezing days. Even in colder winters, freezes are brief and mild, insufficient to truly end pollen or mold seasons. This means grass can continue producing pollen into November or December, ragweed persists until a significant cold front finally arrives, trees start pollinating again as early as January, and mold operates on a twelve-month cycle with no meaningful winter dormancy. The timing of the first hard freeze each fall is the single most important variable for the length of the fall allergy season — and in warm years, it may not come until January, creating an effectively continuous allergen calendar. For residents who relocated from northern states where winter meant four or five months of complete allergy relief, the Coastal Bend's perpetual allergen cycle is a dramatic adjustment.
HeyAllergy's telemedicine platform connects Corpus Christi and Coastal Bend residents to board-certified allergists and immunologists licensed in Texas. A virtual consultation from home eliminates the need to navigate traffic to see a specialist. Allergy blood tests are ordered at a convenient local lab, and a personalized treatment plan is developed based on your specific triggers. HeyPak sublingual immunotherapy drops ship directly to your door and treat the root cause of allergies by building your immune system's tolerance to Coastal Bend allergens — from live oak and Bermuda grass to ragweed, mountain cedar, mold, and dust mites. In a subtropical climate where mold grows year-round, pollen seasons overlap continuously, and allergens arrive from the Hill Country and across the Mexican border, treating the underlying cause offers sustained relief that seasonal medication rotations cannot match.
