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Real-time pollen data for Corpus Christi — updated daily.
Corpus Christi's tree pollen season starts earlier and lasts longer than most Texas cities because the subtropical climate prevents true winter dormancy. Mountain cedar (Ashe juniper) is the most notorious allergen affecting the Coastal Bend despite the trees not growing locally. Mountain cedar occupies approximately 8.6 million acres of the Texas Hill Country and Central Texas, roughly 130 miles northwest of Corpus Christi. Cold fronts and prevailing northwesterly winter winds carry cedar pollen from the Hill Country directly into the Coastal Bend, producing what local allergists describe as "astronomically high" cedar pollen counts from December through February. Cedar fever symptoms are intense — severe nasal congestion, sore throat, fatigue, headache, and facial pressure — and frequently mistaken for the flu. As cedar fades in late February, live oak immediately takes over as the dominant spring allergen. Live oak pollen is especially visible and problematic in Corpus Christi, coating cars, pets, sidewalks, and outdoor furniture in a fine yellow powder from March through May. Hackberry is a significant local tree allergen. Ash trees pollinate early in the season. Elm, pecan, and mesquite are common throughout the Coastal Bend landscape. The transition from cedar to spring tree pollen creates weeks of overlapping allergen exposure with no break between winter and spring seasons.
Grass pollen is a major allergen in Corpus Christi, with the warm subtropical climate extending the season from roughly March through October — significantly longer than most of the country. Bermuda grass is the dominant grass allergen in South Texas, thriving in the heat and present in residential lawns, parks, athletic fields, and commercial landscapes. Johnson grass is common in disturbed soils, roadsides, and open areas throughout the Coastal Bend. Bahia grass is prevalent in South Texas landscapes. Big bluestem and other native grasses produce pollen in natural areas. The Corpus Christi area's extensive outdoor spaces — including parks, golf courses, Hans and Pat Suter Wildlife Refuge along Oso Bay, and the South Texas Botanical Gardens along Oso Creek — maintain large areas of actively pollinating grass through the growing season. Warm, dry, windy conditions common to the Coastal Bend spread grass pollen efficiently across the city.
Ragweed is the dominant fall allergen in Corpus Christi, peaking in October and persisting into November. A single ragweed plant can produce up to a billion pollen grains per season, and ragweed pollen has been measured 400 miles out to sea and two miles into the atmosphere — distances that illustrate how effectively it travels on Coastal Bend winds. Ragweed can grow taller than a person and produces potent pollen that triggers intense hay fever symptoms. Sagebrush contributes additional fall pollen. Pigweed and lamb's quarters grow in disturbed soils and construction areas. Russian thistle produces allergenic pollen in drier inland areas. The Coastal Bend's mild fall temperatures delay the first freeze significantly — some years Corpus Christi never experiences an official freeze at all — meaning weed pollen season extends later into the year than in most Texas cities. Without a hard freeze to shut down pollen production, fall allergens can persist deep into November and occasionally beyond.
Corpus Christi's position on the Gulf Coast creates conditions that make mold the city's most persistent year-round allergen. The city is surrounded by water on three sides — Corpus Christi Bay to the east, Nueces Bay to the west, and Oso Bay to the south — and this bay-surrounded geography drives humidity levels that sustain mold growth throughout the year. The subtropical climate features a wet season from April through October and a drier season from November through March, but even the "dry" season maintains enough Gulf moisture to support mold. Outdoor mold species including Alternaria and Cladosporium thrive in the humid coastal environment. Thunderstorms, common during summer months, create a specific post-storm allergen surge — rain disturbs mold spores, grass pollen, and plant allergens, releasing them into the air, and pollen counts typically spike the day after rainstorms. Indoor mold develops readily in Corpus Christi homes due to the persistent humidity, particularly in bathrooms, kitchens, HVAC systems, and any areas with poor ventilation. Dust mites thrive in the humid environment year-round. Cockroach allergens are a significant indoor trigger in the warm, damp South Texas climate, with several cockroach species producing allergenic droppings and saliva. Pet dander adds to the indoor allergen burden, particularly during winter when residents spend more time indoors with pets.
Severity: High to Severe
While most of the country's allergy season is dormant in winter, Corpus Christi faces its most distinctive allergen: mountain cedar pollen. Cold fronts and northwesterly winds carry massive quantities of Ashe juniper pollen from the Texas Hill Country — approximately 130 miles northwest — directly into the Coastal Bend. Local allergists describe cedar pollen counts as "astronomically high" during this period, peaking in January and February. Cedar fever symptoms are intense and frequently mistaken for influenza: severe nasal congestion, sore throat, fatigue, headache, and facial pressure. Despite being a coastal city far from the cedar belt, Corpus Christi receives significant cedar pollen loads because the same cold fronts that bring cooler temperatures also push cedar pollen southeastward. Late February brings the transition to spring tree pollen as elm and ash begin pollinating, creating overlap with the tail end of cedar season. Gulf Coast humidity sustains mold growth even during the cooler months, adding a persistent background allergen. Indoor allergens — dust mites, pet dander, cockroach allergens — intensify as residents spend more time indoors during occasional cold snaps.
Severity: High to Severe
Spring is the most intense pollen period in Corpus Christi. Live oak pollen dominates March and April, producing such heavy loads that the yellow powder visibly coats every outdoor surface — cars, sidewalks, patio furniture, backyard grills. Hackberry and pecan add overlapping tree pollen. Mesquite, common throughout the Coastal Bend landscape, contributes spring pollen. Grass pollen begins in March, overlapping with late tree pollen to create weeks of simultaneous multi-allergen exposure. Bermuda grass and Johnson grass become active as temperatures climb. Warm, dry, windy conditions — common in the Coastal Bend spring — disperse pollen efficiently across the city. March is typically the driest month in Corpus Christi (averaging just 1.5 inches of rainfall), meaning there is little rain to wash pollen from the air. Springtime agricultural burns in Mexico can send particulate matter and smoke into the Coastal Bend region, adding respiratory irritants to the already heavy pollen burden. The combination of peak tree pollen, emerging grass pollen, agricultural smoke, and dry windy conditions makes spring the most challenging allergy season in Corpus Christi.
Severity: Moderate to High
Summer in Corpus Christi brings a shift from tree pollen to grass pollen, mold, and humidity-driven allergens. Bermuda grass, Johnson grass, and Bahia grass continue producing pollen through the hottest months, with average summer highs reaching the mid-90s and high humidity levels. The wet season peaks during summer, with September averaging 6.5 inches of rainfall — the wettest month of the year. Thunderstorms are common and create a specific allergy challenge: the day after a thunderstorm, disturbed mold spores, grass pollen, and plant allergens are released into the air, causing pollen counts to spike. This post-storm allergen surge can catch people off guard if they assume rain clears the air. Humidity levels climb through summer, and the bay-surrounded geography of Corpus Christi — water on three sides — intensifies moisture in the air. This sustained humidity is ideal for mold growth both outdoors and indoors. Indoor allergens concentrate as homes remain sealed with air conditioning running constantly. The Gulf breeze provides some relief by dispersing pollen, but it also carries moisture that feeds mold and can transport sea-borne allergens from marine vegetation inland.
Severity: Moderate to High
Fall brings ragweed pollen to peak levels in October, making it the dominant allergen in the Coastal Bend. Ragweed produces extraordinary quantities of pollen — up to a billion grains from a single plant — that travel on coastal winds. Sagebrush and other weed pollens contribute to the fall burden. Mold spore counts increase as fall rains begin and organic material decomposes in the warm, humid environment. Corpus Christi's subtropical climate means the first freeze is significantly delayed compared to most of Texas — some years the city never experiences an official freeze. Without a hard freeze to shut down pollen production, ragweed and other weed pollens persist later into the year than in cities further north. November gradually sees weed pollen declining, but mold remains active and the approach of cedar season by late November or December means there is very little true allergy-free time. The Coastal Bend's mild fall temperatures encourage outdoor activity, increasing allergen exposure precisely when ragweed counts are highest.
Mountain cedar (Ashe juniper) doesn't grow in the Coastal Bend, but Corpus Christi residents experience cedar fever just the same. Approximately 8.6 million acres of Ashe juniper in the Texas Hill Country and Central Texas produce billions of pollen grains each winter. Cold fronts and prevailing northwesterly winds carry this pollen directly into the Coastal Bend, and local allergists describe the resulting cedar pollen counts as "astronomically high" from December through February. Cedar fever symptoms are intense — severe nasal congestion, sore throat, fatigue, headache, and facial pressure — and are frequently mistaken for the flu. The key diagnostic clue is that nasal discharge from cedar fever is clear rather than colored, indicating an allergic reaction rather than an infection. If you're new to Corpus Christi and suddenly develop flu-like symptoms in winter that persist for weeks without fever, cedar fever is the most likely explanation. The same cold fronts that bring welcome cooler temperatures also deliver cedar pollen.
Corpus Christi's summer thunderstorms might seem like they should wash pollen from the air and provide relief. The opposite is often true. Thunderstorms disturb mold spores, grass pollen, and plant allergens, releasing them into the air in concentrated bursts. Pollen counts typically spike the day after a rainstorm in the Coastal Bend. This phenomenon, sometimes called thunderstorm asthma, can trigger sudden severe symptoms in people who normally manage their allergies with medication alone. September is Corpus Christi's wettest month, averaging 6.5 inches of rainfall, and the frequent storms during summer and early fall create repeated post-storm allergen surges. If your symptoms consistently worsen the day after rain, this thunderstorm-triggered release is the mechanism — plan to stay indoors or increase medication the day following storms rather than the day of.
Corpus Christi is surrounded by water on three sides — Corpus Christi Bay to the east, Nueces Bay to the west, and Oso Bay to the south. This bay-surrounded geography drives humidity levels that sustain mold growth twelve months a year. Unlike pollen, which has seasonal peaks and valleys, mold in Corpus Christi is a constant presence. Outdoor species like Alternaria and Cladosporium thrive in the humid coastal environment. Indoor mold develops readily in homes due to persistent moisture, particularly in HVAC systems, bathrooms, and areas with poor ventilation. The wet season from April through October provides additional moisture that intensifies outdoor mold growth. Even during the drier months, Gulf moisture maintains enough humidity to support mold. If your allergy symptoms never fully resolve regardless of pollen season, mold is likely a contributing trigger. Running a dehumidifier, maintaining HVAC systems, and monitoring indoor humidity levels become essential rather than optional in the Coastal Bend climate.
Spring in Corpus Christi is already the most intense pollen period, with live oak coating everything in yellow powder and grass pollen beginning to rise. Agricultural burns in Mexico during spring can compound this challenge by sending particulate matter and smoke into the Coastal Bend region. This smoke adds respiratory irritants to the already-heavy pollen burden, creating a dual assault on airways. When agricultural burn smoke combines with high tree and grass pollen counts, allergy and asthma symptoms can escalate significantly even in people whose symptoms are normally well-controlled. During spring burn events, checking air quality along with pollen counts is essential for managing exposure. The combination of allergens and particulate matter makes these periods among the most challenging respiratory days of the year in the Coastal Bend.
Most of Texas relies on the first hard freeze to shut down fall weed pollen production and provide a winter allergy break. Corpus Christi's subtropical climate means the city may never experience an official freeze in a given year. Without freezing temperatures to kill ragweed and other fall allergens, weed pollen season extends later into the year than in cities further north. Ragweed can persist into November and occasionally beyond. And just as weed pollen finally fades, cedar pollen from the Hill Country begins arriving by late November or December, creating nearly seamless allergen exposure from fall through winter. This near-continuous cycle — ragweed into cedar into spring trees into grass — means Corpus Christi offers very little genuine allergy-free time. Recognizing that seasonal medications may need to be maintained nearly year-round, rather than only during obvious peak seasons, is important for managing symptoms in the Coastal Bend.
HeyAllergy offers telemedicine appointments with board-certified allergists and immunologists licensed in Texas. Book a virtual consultation from your home in Corpus Christi, Portland, Rockport, Kingsville, or anywhere in the Coastal Bend. Have allergy blood tests ordered at a convenient local lab and receive your 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 mountain cedar and live oak to Bermuda grass, ragweed, mold, and dust mites. In a region where pollen never fully stops and Gulf Coast humidity sustains mold year-round, treating the underlying cause offers relief that rotating seasonal medications alone cannot sustain.
January and February bring astronomically high mountain cedar pollen from the Hill Country. March and April see peak live oak pollen that coats every outdoor surface yellow. October brings intense ragweed. Corpus Christi's subtropical climate means the allergen calendar runs nearly year-round with overlapping seasons and very little true allergy-free time.
The most common allergens in Corpus Christi are mountain cedar, live oak, Bermuda grass, ragweed, mold, and dust mites. Mountain cedar pollen is carried from the Hill Country by winter cold fronts. Live oak dominates spring. Bermuda grass covers summer. Ragweed peaks in fall. Mold and dust mites are active year-round due to Gulf Coast humidity. A blood allergy test identifies your specific triggers.
Mountain cedar (Ashe juniper) occupies approximately 8.6 million acres of the Texas Hill Country and Central Texas, roughly 130 miles northwest of Corpus Christi. Cold fronts and prevailing northwesterly winter winds carry billions of pollen grains southeastward directly into the Coastal Bend. Despite the trees not growing locally, Corpus Christi experiences astronomically high cedar pollen counts from December through February.
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 mountain cedar, live oak, Bermuda grass, ragweed, 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.
Effectively yes. Mountain cedar pollen arrives December through February. Live oak and spring trees cover March through May. Grass pollen runs March through October. Ragweed fills August through November. Mold and dust mites are active twelve months a year due to Gulf Coast humidity. The subtropical climate rarely produces a hard freeze, meaning fall allergens persist later than in most Texas cities, and cedar arrives before weed pollen fully fades.
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, is a coastal city of approximately 325,000 residents situated on the Gulf of Mexico in the Texas Coastal Bend. Known as the "Sparkling City by the Sea," Corpus Christi sits at the mouth of the Nueces River where it widens into Corpus Christi Bay, with the city surrounded by water on three sides — Corpus Christi Bay to the east, Nueces Bay to the west, and Oso Bay to the south. Barrier islands including Mustang Island and North Padre Island shield the city from direct Gulf waves while creating the enclosed bay system that defines its geography. This water-surrounded position is the single most important factor shaping Corpus Christi's allergen profile. The persistent humidity driven by the bays, Gulf moisture, and subtropical climate sustains mold growth year-round, making mold the city's most constant allergen. But Corpus Christi also receives massive quantities of mountain cedar pollen carried 130 miles from the Hill Country, experiences extended pollen seasons without hard freezes, and faces unique challenges like post-thunderstorm allergen surges and agricultural smoke from Mexico.
The most distinctive allergen affecting Corpus Christi doesn't grow anywhere near the city. Mountain cedar (Ashe juniper) occupies approximately 8.6 million acres of the Texas Hill Country and Central Texas, roughly 130 miles northwest of the Coastal Bend. Each tree releases billions of pollen grains, and cold fronts that push through Central Texas during winter carry this pollen southeastward on northwesterly winds directly into Corpus Christi. Local allergists describe the resulting cedar pollen counts as "astronomically high" — a remarkable designation for a city so far from the cedar belt. Cedar fever peaks from December through February, producing symptoms intense enough to be routinely mistaken for influenza: severe nasal congestion, sore throat, fatigue, headache, and facial pressure. The phenomenon illustrates how pollen transport over long distances creates allergy challenges in areas where the source trees don't even exist. For newcomers to Corpus Christi who have never been exposed to mountain cedar, the first winter often brings bewildering flu-like symptoms that persist for weeks. Up to 20 percent of Texans develop cedar pollen allergies, and the Coastal Bend is not exempt despite its distance from the Hill Country.
Corpus Christi's position within an interconnected system of bays creates a uniquely humid microclimate. Corpus Christi Bay covers approximately 192 square miles. Nueces Bay extends west to the Nueces River. Oso Bay extends south to Oso Creek. Together with the Gulf of Mexico beyond the barrier islands, the city is essentially immersed in water. This geography drives humidity levels that sustain mold growth twelve months a year — not just during the wet season from April through October, but through the drier winter months as well, when Gulf moisture still keeps the air sufficiently humid for mold. Outdoor mold species including Alternaria and Cladosporium thrive in the subtropical environment. Indoor mold develops readily in homes, particularly in HVAC systems that run constantly during the long hot season, in bathrooms, and in any areas with inadequate ventilation. The warm, humid climate also supports significant cockroach populations, and cockroach allergens — droppings and saliva — are a meaningful indoor trigger for many Corpus Christi residents. Dust mites flourish in the persistent humidity. The combination means that even when outdoor pollen counts drop, indoor allergen exposure continues unabated.
Corpus Christi's summer thunderstorm pattern creates a counterintuitive allergy challenge. Thunderstorms disturb and release concentrated bursts of mold spores, grass pollen, and other plant allergens that had been dormant or settled. The day after a thunderstorm, pollen and mold counts typically spike — the opposite of what most people assume rain does to air quality. September, the wettest month in Corpus Christi with an average 6.5 inches of rainfall, produces frequent storm cycles followed by allergen surges. This phenomenon, related to what researchers call thunderstorm asthma, can trigger sudden severe symptoms in people whose allergies are normally well-controlled with medication. The mechanism involves rain breaking pollen grains into smaller particles that penetrate deeper into airways, combined with wind patterns that concentrate these particles at ground level. For Corpus Christi residents accustomed to outdoor coastal living, understanding that the day after a storm is often worse than the day of the storm changes how they plan outdoor activities during the wet season.
Corpus Christi's position in subtropical South Texas gives it one of the longest allergen calendars in the state. Mountain cedar pollen arrives from the Hill Country in December and persists through February. Live oak and other spring trees dominate March through May. Grass pollen runs from March through October — an eight-month season enabled by the warm climate. Ragweed and fall weeds cover August through November. Mold and indoor allergens are constant twelve months a year. The critical factor that distinguishes Corpus Christi from more northern Texas cities is the absence of a reliable hard freeze. Most of Texas depends on the first freeze to shut down fall pollen production and create a winter break. Corpus Christi may not freeze at all in a given year, meaning ragweed and other weeds can produce pollen later into November and occasionally beyond. And just as fall allergens finally fade, mountain cedar pollen is already arriving from the northwest. The result is nearly seamless allergen coverage from one season to the next, with overlapping transitions that leave almost no truly allergy-free window. This near-continuous cycle is why many Coastal Bend residents feel their allergies never fully resolve and why seasonal medications alone often provide incomplete relief.
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 mountain cedar carried by Hill Country winds to live oak, Bermuda grass, ragweed, mold, and dust mites. In a region where the allergen calendar runs nearly year-round and Gulf Coast humidity sustains mold every day of the year, treating the underlying cause of your allergies offers sustained relief that seasonal medication rotations cannot match.
