The Springfield year in pollen
Pollen seasons in Springfield: tree pollen March to June, grass May to July, and ragweed from mid-August until the first frost, around October 8.
First frost lands around October 8 in Springfield — about 13 days earlier than Massachusetts overall — which shifts when ragweed season ends here.
When does ragweed season end in Springfield?
Ragweed season in Springfield typically ends with the first frost, around October 8. Some years it comes as early as October 3, some as late as October 15.
A light frost around October 8 knocks the season down; the hard freeze that finishes it usually follows by October 20. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Springfield 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 Massachusetts page.
Nearby calendars
Frost dates for Springfield come from the Westfield Barnes Municipal Airport weather station's 30-year records. Season windows reviewed August 2026.