Michigan pollen and allergy seasons
Michigan has a spring tree season, grass in early summer, and a heavy ragweed season in the fall.
Twelve month pollen calendar
What is active in September
Cities in Michigan
No tracked cities yet for Michigan.
Today and worst today come from live readings where available. Typical shows the usual level for this month from the seasonal profile.
Pollen is only half of what's in the air. See today's air quality in Michigan for ozone, dust, and smoke readings by city.
The Michigan allergy season
Allergy levels in Michigan peak in September, when ragweed pollen runs highest. The season moves through tree pollen around April, grass in June, weed pollen such as ragweed in September. Levels start to climb around April. The lowest pollen levels of the year arrive in January.
Common questions
When does allergy season start in Michigan?
Pollen levels in Michigan usually begin climbing in April and reach their highest point in September.
What is the worst month for allergies in Michigan?
September is typically the worst month in Michigan, driven by ragweed pollen.
When does ragweed season end in Michigan?
Ragweed pollen in Michigan usually fades by the end of October, after the first hard frost in colder areas.
When is the best time for allergies in Michigan?
January usually brings the lowest pollen levels of the year in Michigan.