The Lincoln year in pollen
Pollen seasons in Lincoln: tree pollen February to May, grass May to August, and ragweed from early August until the first frost, around October 13.
Tree pollen
Grass
Ragweed
When does ragweed season end in Lincoln?
Ragweed season in Lincoln typically ends with the first frost, around October 13. Some years it comes as early as October 7, some as late as October 18.
A light frost around October 13 knocks the season down; the hard freeze that finishes it usually follows by October 22. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Lincoln pollen year
| Allergen | Typical season |
|---|---|
| Eastern red cedar | February to April |
| Elm | February to April |
| Maple | March to April |
| Oak | April to May |
| Cottonwood | April to May |
| Grass | May to August |
Season-by-season detail is on the Nebraska page.
Nearby calendars
Frost dates for Lincoln come from the Lincoln Municipal Airport weather station's 30-year records. Season windows reviewed August 2026.