The Fort Worth year in pollen
Pollen seasons in Fort Worth: tree pollen December to May, grass March to October, and ragweed from early August until the first frost, around November 24.
First frost lands around November 24 in Fort Worth — about 5 days earlier than Texas overall — which shifts when ragweed season ends here.
When does ragweed season end in Fort Worth?
Ragweed season in Fort Worth typically ends with the first frost, around November 24. Some years it comes as early as November 14, some as late as December 2.
A light frost around November 24 knocks the season down; the hard freeze that finishes it usually follows by December 6. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Fort Worth 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 Fort Worth come from the Ft Worth Meacham Field Naaf weather station's 30-year records. Season windows reviewed August 2026.