The Newport year in pollen
Pollen seasons in Newport: tree pollen March to June, grass May to July, and ragweed from mid-August until the first frost, around November 4.
First frost lands around November 4 in Newport — about 5 days later than Rhode Island overall — which shifts when ragweed season ends here.
When does ragweed season end in Newport?
Ragweed season in Newport typically ends with the first frost, around November 4. Some years it comes as early as October 30, some as late as November 9.
A light frost around November 4 knocks the season down; the hard freeze that finishes it usually follows by November 16. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Newport 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 Newport come from the Newport State Airport weather station's 30-year records. Season windows reviewed August 2026.