The Santa Fe year in pollen
Pollen seasons in Santa Fe: tree pollen February to June, grass April to October, and ragweed from early August until the first frost, around October 15.
First frost lands around October 15 in Santa Fe — about 9 days earlier than New Mexico overall — which shifts when ragweed season ends here.
When does ragweed season end in Santa Fe?
Ragweed season in Santa Fe typically ends with the first frost, around October 15. Some years it comes as early as October 10, some as late as October 19.
A light frost around October 15 knocks the season down; the hard freeze that finishes it usually follows by October 24. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Santa Fe 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 Santa Fe come from the Santa Fe Co Municipal Airport weather station's 30-year records. Season windows reviewed August 2026.