The Jacksonville year in pollen
Pollen seasons in Jacksonville: tree pollen December to April, grass March to October, and ragweed from mid-July until the first frost, around January 5.
First frost lands around January 5 in Jacksonville — about 5 days earlier than Florida overall — which shifts when ragweed season ends here.
When does ragweed season end in Jacksonville?
Ragweed season in Jacksonville typically ends with the first frost, around January 5. Some years it comes as early as December 24, some as late as January 16.
A light frost around January 5 knocks the season down; the hard freeze that finishes it usually follows by January 14. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Jacksonville pollen year
| Allergen | Typical season |
|---|---|
| Oak (live oak) | January to April |
| Pine | January to April |
| Cypress and red cedar | December to February |
| Grass | March to October |
Season-by-season detail is on the Florida page.
Nearby calendars
Frost dates for Jacksonville come from the Jacksonville Nas weather station's 30-year records. Season windows reviewed August 2026.