The Chattanooga year in pollen
Pollen seasons in Chattanooga: tree pollen January to May, grass April to September, and ragweed from early August until the first frost, around November 9.
First frost lands around November 9 in Chattanooga — about 6 days later than Tennessee overall — which shifts when ragweed season ends here.
When does ragweed season end in Chattanooga?
Ragweed season in Chattanooga typically ends with the first frost, around November 9. Some years it comes as early as November 3, some as late as November 14.
A light frost around November 9 knocks the season down; the hard freeze that finishes it usually follows by November 22. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Chattanooga 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 Tennessee page.
Nearby calendars
Frost dates for Chattanooga come from the Chattanooga Lovell Airport weather station's 30-year records. Season windows reviewed August 2026.