The Waco year in pollen
Pollen seasons in Waco: tree pollen December to May, grass March to October, and ragweed from early August until the first frost, around November 15.
First frost lands around November 15 in Waco — about 14 days earlier than Texas overall — which shifts when ragweed season ends here.
When does ragweed season end in Waco?
Ragweed season in Waco typically ends with the first frost, around November 15. Some years it comes as early as November 8, some as late as November 24.
A light frost around November 15 knocks the season down; the hard freeze that finishes it usually follows by November 28. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Waco 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 Waco come from the Waco Regional Airport weather station's 30-year records. Season windows reviewed August 2026.