TX · Allergy Season Guide
Texas Allergy Season Guide
Texas experiences a wide range of climates from humid subtropical in the east to semi-arid in the west, with hot summers and mild winters statewide.
Seasonal focus · Dec–Feb
Cedar Fever — Texas's most intense allergy season
Ashe juniper (mountain cedar) pollen peaks across the Hill Country every winter. Real microscope counts, symptoms, season timing, and relief — in the dedicated cedar fever guide.
Open the Cedar Fever GuideSummary
Texas has 0 active PollyMap collection sites, and is seeking partners in 10 additional cities. Tree pollen typically dominates early spring, grass pollen peaks in late spring and early summer, and weed pollen (including ragweed) extends from late summer through fall.
PollyMap collection status across Texas
While we find a local clinic
Test the air at your own home in Texas
No allergy clinic is reporting from Texas yet. Until one does, you can order your own PollyKit — a simple air sampler you hang outdoors or indoors. Send it back and the PollyKit Lab shows you exactly what's floating in your air.
- Pollen from local trees, grasses and weeds
- Airborne mold spores
- Dust mites and other indoor allergens
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See which pollen and mold are in your yard this season.
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Check bedrooms and living spaces for mold, dust mites and more.
Statewide allergy overview
Texas experiences a wide range of climates from humid subtropical in the east to semi-arid in the west, with hot summers and mild winters statewide.
Mountain cedar (Ashe juniper) produces a notorious December-through-February allergy season known as 'cedar fever'. Oak follows in spring, Bermuda grass pollinates through summer, and ragweed peaks in fall.
Humid Gulf air keeps mold counts elevated most of the year, with sharp spikes after thunderstorms.
Allergy patterns vary by elevation and proximity to coast or mountains within Texas, but most of the state shares a common seasonal rhythm of spring tree pollen, summer grass pollen, and late-summer to fall weed pollen.
Texas allergy calendar
Month-by-month intensity for the four major airborne allergen categories.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | V.High | V.High | High | High | Mod | Low | Low | Low | Low | Mod | High | V.High |
| Grass | Low | Low | Mod | High | V.High | V.High | High | Mod | Mod | Low | Low | Low |
| Weed | Low | Low | Mod | Mod | Mod | Mod | High | V.High | V.High | High | Mod | Low |
| Mold | Mod | Mod | Mod | High | High | High | V.High | V.High | V.High | High | Mod | Mod |
Seasonal focus · Oct–Dec
October–December in Texas
Fall is a genuine second allergy season in Texas. Ragweed (Ambrosia) peaks from late August through October across most of the state, and warm autumns can keep counts elevated into November. Outdoor mold spores climb after fall rains and as leaf litter builds, especially in East Texas and along the Gulf Coast.
Then, before the rest of the country has finished with fall, Central Texas starts its most famous season: mountain cedar (Ashe juniper, Juniperus ashei) typically begins releasing pollen in December across the Hill Country, building toward its January peak. For many Texans, cedar fever — not ragweed — is the worst allergy stretch of the year, and it starts while most states are winding down.
Top tree pollens
Top weed pollens
Top airborne molds
Major city guides in Texas
TX
Houston
View Houston allergy season guide →
TX
San Antonio
View San Antonio allergy season guide →
TX
Dallas
View Dallas allergy season guide →
TX
Austin
View Austin allergy season guide →
TX
Fort Worth
View Fort Worth allergy season guide →
Latest PollyMap reports for Texas
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