The Columbia year in pollen
Pollen seasons in Columbia: tree pollen January to May, grass April to September, and ragweed from early August until the first frost, around November 19.
Tree pollen
Grass
Ragweed
When does ragweed season end in Columbia?
Ragweed season in Columbia typically ends with the first frost, around November 19. Some years it comes as early as November 12, some as late as November 27.
A light frost around November 19 knocks the season down; the hard freeze that finishes it usually follows by December 4. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Columbia 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 South Carolina page.
Nearby calendars
Frost dates for Columbia come from the Columbia Owens Dwtn Airport weather station's 30-year records. Season windows reviewed August 2026.