The Birmingham year in pollen
Pollen seasons in Birmingham: tree pollen January to May, grass April to September, and ragweed from early August until the first frost, around November 11.
Tree pollen
Grass
Ragweed
When does ragweed season end in Birmingham?
Ragweed season in Birmingham typically ends with the first frost, around November 11. Some years it comes as early as November 6, some as late as November 19.
A light frost around November 11 knocks the season down; the hard freeze that finishes it usually follows by November 24. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Birmingham pollen year
| Allergen | Typical season |
|---|---|
| Oak | March to May |
| Pine | March to May |
| Eastern red cedar | January to March |
| Maple | February to April |
| Birch | March to April |
| Hickory | April to May |
| Grass | April to September |
Season-by-season detail is on the Alabama page.
Nearby calendars
Frost dates for Birmingham come from the Birmingham Airport weather station's 30-year records. Season windows reviewed August 2026.