The Dallas year in pollen
Pollen seasons in Dallas: tree pollen December to May, grass March to October, and ragweed from early August until the first frost, around November 29.
Tree pollen
Grass
Ragweed
When does ragweed season end in Dallas?
Ragweed season in Dallas typically ends with the first frost, around November 29. Some years it comes as early as November 20, some as late as December 5.
A light frost around November 29 knocks the season down; the hard freeze that finishes it usually follows by December 12. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Dallas 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 Dallas come from the Dallas Love Field weather station's 30-year records. Season windows reviewed August 2026.