The Mobile year in pollen
Pollen seasons in Mobile: tree pollen January to May, grass April to September, and ragweed from early August until the first frost, around December 6.
First frost lands around December 6 in Mobile — about 25 days later than Alabama overall — which shifts when ragweed season ends here.
When does ragweed season end in Mobile?
Ragweed season in Mobile typically ends with the first frost, around December 6. Some years it comes as early as November 28, some as late as December 19.
A light frost around December 6 knocks the season down; the hard freeze that finishes it usually follows by December 30. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Mobile 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 Mobile come from the Mobile Dwtn Airport weather station's 30-year records. Season windows reviewed August 2026.