The Providence year in pollen
Pollen seasons in Providence: tree pollen March to June, grass May to July, and ragweed from mid-August until the first frost, around October 30.
Tree pollen
Grass
Ragweed
When does ragweed season end in Providence?
Ragweed season in Providence typically ends with the first frost, around October 30. Some years it comes as early as October 24, some as late as November 3.
A light frost around October 30 knocks the season down; the hard freeze that finishes it usually follows by November 9. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Providence 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 Rhode Island page.
Nearby calendars
Frost dates for Providence come from the Providence T F Green Airport weather station's 30-year records. Season windows reviewed August 2026.