The Marquette year in pollen
Pollen seasons in Marquette: tree pollen March to June, grass May to July, and ragweed from mid-August until the first frost, around October 21.
Tree pollen
Grass
Ragweed
When does ragweed season end in Marquette?
Ragweed season in Marquette typically ends with the first frost, around October 21. Some years it comes as early as October 15, some as late as October 28.
A light frost around October 21 knocks the season down; the hard freeze that finishes it usually follows by November 2. Based on 30 years of NOAA frost records (1991–2020).
The rest of the Marquette pollen year
| Allergen | Typical season |
|---|---|
| Birch | April to May |
| Oak | April to June |
| Maple | March to May |
| Alder | March to April |
| Ash | April to May |
| Pine | May to June |
| Grass | May to July |
Season-by-season detail is on the Michigan page.
Nearby calendars
Frost dates for Marquette come from the Marquette weather station's 30-year records. Season windows reviewed August 2026.