Houston, TX Grass Pollen
Grass pollen in Houston usually peaks around May, reaching High at its worst. Houston sits on the humid Gulf coast, far from the Hill Country cedar that defines central Texas. Its allergy year leans on a big oak and pine spring, grass through the long warm season, and ragweed in fall.
Grass pollen runs from spring well into the fall in Houston's long warm season, with Bermuda grass the main trigger.
Grass in Houston today
Tuesday, July 28, 2026
Grass pollen by month in Houston
How grass usually runs across the year. The current month is outlined.
Managing grass season in Houston
If grass is your trigger, start a daily antihistamine like cetirizine (Zyrtec) or loratadine (Claritin) a week or two before the May peak, rather than waiting for symptoms. Keep windows closed on high-count mornings, shower and change clothes after time outside, and run the AC on recirculate in the car.
When symptoms don't ease with over-the-counter medicine, an allergist in Texas can test whether grass is really what you react to and talk through longer-term options like allergy shots.
Sources
More pollen in Houston
- Houston oak pollen — peaks March.
- Houston ragweed pollen — peaks September.
- Houston pine pollen — peaks late February and March.
- Houston pollen calendar — every allergen, month by month.
- Houston pollen count today — live tree, grass, and weed levels with a 5-day forecast.
- Texas pollen season — the statewide calendar and other cities.
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Sign up for free alertsSeasonal pattern based on Texas pollen data and local sources. Today's reading updated daily. MyPollenPal