The Roswell year in pollen
Pollen seasons in Roswell: tree pollen February to June, grass April to October, and ragweed from early August until the first frost, around November 7.
First frost lands around November 7 in Roswell — about 14 days later than New Mexico overall — which shifts when ragweed season ends here.
When does ragweed season end in Roswell?
Ragweed season in Roswell typically ends with the first frost, around November 7. Some years it comes as early as November 2, some as late as November 12.
A light frost around November 7 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 Roswell pollen year
| Allergen | Typical season |
|---|---|
| Juniper | February to April |
| Mulberry | February to April |
| Ash | February to April |
| Olive | April to May |
| Mesquite | April to June |
| Grass | April to October |
Season-by-season detail is on the New Mexico page.
Nearby calendars
Frost dates for Roswell come from the Roswell Ind Air Park weather station's 30-year records. Season windows reviewed August 2026.