The Austin year in pollen
Pollen seasons in Austin: tree pollen December to May, grass March to October, and ragweed from early August until the first frost, around December 3.
First frost lands around December 3 in Austin — about 4 days later than Texas overall — which shifts when ragweed season ends here.
When does ragweed season end in Austin?
Ragweed season in Austin typically ends with the first frost, around December 3. Some years it comes as early as November 26, some as late as December 13.
A light frost around December 3 knocks the season down; the hard freeze that finishes it usually follows by December 27. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Austin pollen year
| Allergen | Typical season |
|---|---|
| Mountain cedar (Ashe juniper) | December to February |
| Oak (live oak) | March to May |
| Elm | February to April |
| Cedar elm (fall) | August to October |
| Pecan | April to May |
| Cottonwood | March to April |
| Grass | March to October |
Season-by-season detail is on the Texas page.
Nearby calendars
Frost dates for Austin come from the Austin-Camp Mabry weather station's 30-year records. Season windows reviewed August 2026.