The Winston-Salem year in pollen
Pollen seasons in Winston-Salem: 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 Winston-Salem — about 5 days later than North Carolina overall — which shifts when ragweed season ends here.
When does ragweed season end in Winston-Salem?
Ragweed season in Winston-Salem typically ends with the first frost, around November 9. Some years it comes as early as November 3, some as late as November 15.
A light frost around November 9 knocks the season down; the hard freeze that finishes it usually follows by November 23. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Winston-Salem 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 North Carolina page.
Nearby calendars
Frost dates for Winston-Salem come from the Winston Salem Rynlds Airport weather station's 30-year records. Season windows reviewed August 2026.