The Syracuse year in pollen
Pollen seasons in Syracuse: tree pollen March to June, grass May to July, and ragweed from mid-August until the first frost, around October 19.
First frost lands around October 19 in Syracuse — about 6 days earlier than New York overall — which shifts when ragweed season ends here.
When does ragweed season end in Syracuse?
Ragweed season in Syracuse typically ends with the first frost, around October 19. Some years it comes as early as October 11, some as late as October 26.
A light frost around October 19 knocks the season down; the hard freeze that finishes it usually follows by November 2. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Syracuse pollen year
| Allergen | Typical season |
|---|---|
| Maple | March to April |
| Birch | April to May |
| Oak | April to June |
| Ash | April to May |
| Pine | May to June |
| Grass | May to July |
Season-by-season detail is on the New York page.
Nearby calendars
Frost dates for Syracuse come from the Syracuse Hancock International Airport weather station's 30-year records. Season windows reviewed August 2026.