The Buffalo year in pollen
Pollen seasons in Buffalo: tree pollen March to June, grass May to July, and ragweed from mid-August until the first frost, around October 26.
Tree pollen
Grass
Ragweed
When does ragweed season end in Buffalo?
Ragweed season in Buffalo typically ends with the first frost, around October 26. Some years it comes as early as October 19, some as late as November 1.
A light frost around October 26 knocks the season down; the hard freeze that finishes it usually follows by November 6. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Buffalo 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 Buffalo come from the Buffalo weather station's 30-year records. Season windows reviewed August 2026.