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Real-time pollen data for College Station — updated daily.
Mountain cedar (Ashe juniper) pollen arrives from the Hill Country on winter cold fronts, starting the tree pollen season as early as December. Post oak — the ecoregion's namesake species — produces heavy pollen loads from March through April. Live oak, which dominates Texas A&M's landscaped campus, overlaps with post oak. Blackjack oak, black hickory, pecan, cedar elm, and sugarberry all contribute to the spring pollen surge. Eastern red cedar, which has invaded former grasslands due to fire suppression, adds pollen from December through February. The Brazos River bottomland contributes water oak, green ash, and eastern cottonwood pollen.
Bermuda grass is the dominant turf species across College Station's residential lawns, Texas A&M's athletic fields, and public parks. The grass pollen season in the Brazos Valley is exceptionally long — from April through October — due to the warm subtropical climate. Bahiagrass, commonly used in pastures surrounding the Bryan-College Station metro, adds to the regional grass pollen burden. Johnson grass grows wild along roadways and agricultural margins. Native Post Oak Savannah bunch grasses, including little bluestem and Indian grass, contribute pollen in restoration areas and undeveloped land.
Ragweed is the dominant fall allergen, peaking from mid-August through October — coinciding precisely with the fall semester start and football season. Lamb's quarters, pigweed, and marsh elder thrive in the disturbed soils of ongoing construction throughout College Station's rapidly growing southern and eastern corridors. The flat Post Oak Savannah terrain provides no barrier to ragweed pollen dispersal from surrounding agricultural and ranch land.
Mold is one of the Brazos Valley's most significant allergens. The Post Oak Savannah's impervious clay pan traps moisture near the surface, and the region's 28–40 inches of annual rainfall (peaking May–June) ensures frequent soil saturation. Brazos River bottomland forests produce enormous mold spore volumes from decomposing organic matter. Indoor mold is common in older student apartments near campus where HVAC systems struggle against 80%+ summer humidity. Alternaria, Cladosporium, and Aspergillus are all prevalent in the region.
Dust mites thrive in College Station's humid indoor environments, particularly in the dense student apartment complexes along University Drive, Texas Avenue, and Wellborn Road where buildings may have aging or undersized HVAC systems. Pet dander is a significant factor — many student households have dogs or cats. Cockroach allergens are documented contributors to asthma in the Brazos Valley's residential settings.
Severity: Moderate. Mountain cedar pollen arrives from the Hill Country on cold fronts, triggering cedar fever symptoms that mimic the flu. Local eastern red cedar — which has invaded Post Oak Savannah grasslands due to decades of fire suppression — also produces pollen. Elm begins pollinating in late January. Mold remains baseline-elevated in bottomland areas. This is the Brazos Valley's lowest-pollen period, offering partial relief.
Severity: Severe. This is College Station's worst allergy period. Post oak, the region's defining tree species, produces heavy pollen from March through April. Live oak — planted extensively across the Texas A&M campus and residential areas — peaks simultaneously. Blackjack oak, pecan, and cedar elm add to the load. Spring thunderstorms can trigger "thunderstorm asthma" events where pollen grains burst into sub-pollen particles that penetrate deep into airways.
Severity: High. Bermuda grass pollen peaks across all maintained landscapes. This period also brings the Brazos Valley's heaviest rainfall, saturating the Post Oak Savannah's poorly draining clay-pan soils and triggering explosive mold growth in bottomland areas. Humidity climbs above 80%, making indoor environments increasingly challenging for dust mite and mold control. The combination of grass pollen and mold creates a dual allergen assault.
Severity: Moderate to High. Temperatures routinely exceed 95°F with stifling humidity. Grass pollen continues. Mold is elevated year-round but peaks in this warm, humid window. Ragweed begins ramping up in mid-August, precisely as 70,000+ students return for the fall semester. Dust mites thrive in the humid indoor environments of apartments and dormitories.
Severity: High. Ragweed peaks across the Brazos Valley, coinciding with the start of the academic year and the heart of Texas A&M football season. Students spending hours at outdoor tailgates and in the 102,000-seat Kyle Field are exposed to peak ragweed pollen. Fall mold increases as leaf litter accumulates in the post oak canopy and along creek corridors. Many students experiencing their first Texas fall after relocating are caught off guard.
Severity: Low. The first freeze reduces ragweed and grass pollen. Cedar hasn't fully arrived yet. This is the only reliable low-allergen period in the Brazos Valley. However, leaf decomposition under the post oak canopy produces mold spore releases, and indoor allergens increase as homes and apartments are sealed for cooler weather.
College Station draws 70,000+ students and thousands of faculty and staff from across the country and internationally. If you moved to the Brazos Valley and developed allergies you never had before, this is extremely common. After 2–3 years of exposure to the Post Oak Savannah's specific allergens — post oak pollen, Bermuda grass, ragweed, and regional mold — your immune system can develop new sensitivities. Don't dismiss worsening symptoms as "just a cold" — get tested to identify your specific triggers.
Texas A&M's outdoor culture — football tailgating, Bonfire Memorial visits, Corps of Cadets formations, Aggie Ring Day celebrations — puts attendees in peak allergen exposure for hours at a time. Check the Brazos Valley pollen forecast before major outdoor events, especially during March–April tree pollen and September–October ragweed seasons. Pre-medicate before spending extended time outdoors, and consider changing clothes before going home to avoid tracking pollen into your apartment or dorm.
Many student apartment complexes near Texas A&M, particularly along University Drive and Texas Avenue, are older buildings with HVAC systems that struggle against Brazos Valley humidity. When indoor humidity consistently exceeds 60%, mold colonizes HVAC ducts, bathroom ceilings, and window frames. Request your landlord address visible mold, run a portable dehumidifier, and report persistent moisture issues — Texas property law requires habitable conditions including mold remediation.
Lick Creek Park's 515 acres of Post Oak Savannah woodland and the Bee Creek Park trails are popular with runners and mountain bikers, but these trails pass through concentrated post oak and yaupon holly corridors where pollen and mold accumulate. In spring, exercise on trails in the late afternoon when tree pollen counts drop. After fall rains, avoid bottomland trail sections where mold spore counts spike from decomposing leaf litter on the clay soil surface.
College Station's Post Oak Savannah soils have a dense clay pan just a few feet below the surface that is nearly impervious to water. During heavy rains — common in the Brazos Valley's May–June rainfall peak — water can't drain through the clay pan and instead pools near the surface. This creates standing moisture around home foundations, feeding mold growth in crawl spaces and ground-floor walls. If your home has persistent moisture or musty odors after rain, the clay pan is likely a contributing factor.
College Station sits about 90 miles east of the Hill Country cedar belt. When cold fronts push through central Texas in December–February, they carry mountain cedar (Ashe juniper) pollen into the Brazos Valley. Symptoms mimic the flu: fatigue, headache, sore throat, heavy congestion. Monitor weather fronts and pre-medicate before norther arrivals. Cedar fever catches many Aggies off guard because the juniper trees don't grow locally — the pollen travels on the wind.
March through April is typically the worst for tree pollen, when post oak, live oak, and pecan peak simultaneously. September coincides with both ragweed peak and the fall semester start, hitting students hard. The May–June rainfall peak triggers mold surges. College Station has only a brief relief window in late November through early December.
This is extremely common among Texas A&M students and Brazos Valley transplants. After 2–3 years of exposure to the Post Oak Savannah's specific allergens — post oak pollen, Bermuda grass, ragweed, regional mold — your immune system develops new sensitivities. Many students who were allergy-free as freshmen experience significant symptoms by junior year.
College Station sits in the Post Oak Savannah ecoregion with an impervious clay pan that traps moisture and promotes mold. The Brazos River bottomland creates year-round mold habitat. The dominant trees (post oak, blackjack oak) differ from Houston's Piney Woods or Dallas's Cross Timbers. And the massive seasonal student population turnover creates a unique dynamic of new-onset allergies.
Yes. HeyAllergy provides telemedicine appointments with board-certified allergists licensed in Texas. Book a virtual consultation, have allergy blood tests ordered at a local lab, and start personalized treatment — all without visiting a clinic. No waitlist. Treatment continues even if you graduate and move to another state where HeyAllergy operates.
HeyAllergy's HeyPak® sublingual immunotherapy drops are customized based on your allergy blood test results. For College Station residents, this typically targets local post oak, live oak, Bermuda grass, ragweed, mold, and dust mite allergens. Daily drops under the tongue retrain your immune system, with improvement typically seen in 3–6 months and 3–5 years recommended for lasting relief.
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 telemedicine coverage. Student health insurance plans vary — check with your provider.
Yes. The Brazos Valley's high humidity, frequent heavy rainfall, and the Post Oak Savannah's impervious clay pan create persistent moisture conditions. Many older apartment complexes near Texas A&M have HVAC systems that can't adequately manage 80%+ summer humidity. Running a portable dehumidifier, reporting visible mold to property management, and using a HEPA air purifier can significantly reduce indoor mold exposure.
Cedar fever is caused by massive pollen release from Ashe juniper trees in the Texas Hill Country, about 90 miles west. The pollen travels on cold fronts into the Brazos Valley from December through February. Symptoms mimic the flu. The trees don't grow locally, so many residents don't realize the pollen is reaching them until they're tested.
College Station, Texas exists because of Texas A&M University, and virtually everything about the city's allergy profile is shaped by this relationship. The city sits in the Brazos Valley within the Post Oak Savannah ecoregion — a transitional landscape between the East Texas Piney Woods and the Blackland Prairie, dominated by post oak woodlands, bunch grasses, and bottomland hardwood forests along the Brazos River and its tributaries. Each fall, approximately 70,000 students arrive from across Texas, the United States, and over 120 countries, many encountering the Brazos Valley's specific allergen mix for the first time. This creates a unique public health dynamic where a huge proportion of the population is in the early stages of developing new environmental sensitivities.
The Post Oak Savannah ecoregion has a defining geological feature that directly impacts allergy sufferers: a dense clay pan lying just a few feet below the sandy surface soil. This clay layer is nearly impervious to water, creating a perched water table during the Brazos Valley's frequent heavy rains. The result is poor drainage, standing surface moisture, and ideal conditions for outdoor mold growth — especially in the bottomland areas along Lick Creek, Carter Creek, and the Brazos River floodplain.
The ecoregion's vegetation tells an allergy story as well. Originally, post oak and blackjack oak dotted open grassland maintained by frequent wildfires and bison grazing. With fire suppression over the past century, eastern red cedar, yaupon holly, and dense mixed hardwoods have invaded former grasslands. This means College Station's surrounding landscape now produces significantly more tree pollen than it did historically, while the understory's yaupon holly — an evergreen that thrives in shaded, moist conditions — adds year-round pollen and provides habitat for mold.
The Brazos River, one of the longest rivers in Texas, flows just west of College Station and Bryan. Its wide bottomland floodplain supports dense hardwood forests of water oak, pecan, elm, green ash, and eastern cottonwood. These bottomland forests are among the most prolific mold-generating environments in central Texas. After seasonal flooding or heavy rain events, the combination of standing water, decomposing organic matter, and 28–40 inches of annual rainfall creates conditions for explosive mold growth.
College Station's humid subtropical climate amplifies this: summers regularly exceed 95°F with humidity above 80%, and the May–June rainfall peak can deliver intense thunderstorms that saturate the already poorly draining Post Oak Savannah soils. The practical result is that mold is a year-round allergen in the Brazos Valley, with peaks after every significant rain event rather than following a predictable seasonal pattern.
Texas A&M's main campus spans 5,200 acres — one of the largest university campuses in the United States. The campus features extensive mature live oak plantings, pecan groves, Bermuda grass athletic fields and lawns, and ornamental landscaping that produces pollen from February through November. Century Tree, the iconic live oak at the heart of campus, represents the species that generates some of the heaviest spring pollen loads in the region. The campus's agricultural research fields and the 945-acre Ecology and Natural Resource Teaching Area adjacent to campus add additional allergen sources, including experimental grass plots and native Post Oak Savannah habitat with all its associated pollen and mold.
For students walking between classes, riding the Aggie Spirit bus routes, attending outdoor events at Kyle Field (capacity 102,000+), or studying in open-air spaces, allergen exposure during peak seasons is essentially unavoidable. The student health center at A.P. Beutel sees a significant volume of allergy-related visits, particularly in the fall when ragweed peaks coincide with the start of the academic year and football season.
College Station experiences what allergists recognize as a pronounced new-onset allergy pattern among transplants. Students arriving from the Houston coast, the DFW metroplex, West Texas, or internationally are encountering a specific allergen cocktail — Post Oak Savannah tree pollen, Brazos Valley mold, Bermuda grass, ragweed — that differs from their home environments. It typically takes 2–3 years of continuous exposure before the immune system develops new sensitivities. This means many students who were allergy-free as freshmen begin experiencing significant symptoms by junior or senior year. Faculty and staff who relocate to the Brazos Valley follow the same pattern.
The Brazos Valley's Post Oak Savannah ecology, impervious clay pan, Brazos River bottomland mold, and massive transient university population create an allergy environment unlike the DFW suburbs or the Houston metro. Over-the-counter antihistamines may provide temporary symptom relief but don't address the progressive sensitization that occurs in transplants over 2–3 years.
HeyAllergy connects College Station residents and students with board-certified allergists who understand the Brazos Valley's specific triggers. Through telemedicine, patients receive expert evaluation, allergy blood testing targeting local Post Oak Savannah allergens, and personalized treatment plans including HeyPak® sublingual immunotherapy drops. Treatment starts at $47/month, with improvement typically seen in 3–6 months. No needles, no clinic visits, no waitlist — and treatment continues seamlessly even if you graduate and move to another state where HeyAllergy operates.
