The Las Cruces year in pollen
Pollen seasons in Las Cruces: tree pollen February to June, grass April to October, and ragweed from early August until the first frost, around October 24.
Tree pollen
Grass
Ragweed
When does ragweed season end in Las Cruces?
Ragweed season in Las Cruces typically ends with the first frost, around October 24. Some years it comes as early as October 18, some as late as October 30.
A light frost around October 24 knocks the season down; the hard freeze that finishes it usually follows by November 1. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Las Cruces 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 Las Cruces come from the Las Cruces 20 N weather station's 30-year records. Season windows reviewed August 2026.