Minnesota pollen and allergy seasons
Minnesota has a compressed northern season, with birch and oak in spring, grass in early summer, and a very heavy ragweed season in the fall.
Twelve month pollen calendar
What is active in September
Cities in Minnesota
No tracked cities yet for Minnesota.
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 Minnesota for ozone, dust, and smoke readings by city.
The Minnesota allergy season
Allergy levels in Minnesota 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 Minnesota?
Pollen levels in Minnesota usually begin climbing in April and reach their highest point in September.
What is the worst month for allergies in Minnesota?
September is typically the worst month in Minnesota, driven by ragweed pollen.
When does ragweed season end in Minnesota?
Ragweed pollen in Minnesota usually fades by the end of October, after the first hard frost in colder areas.
When is the best time for allergies in Minnesota?
January usually brings the lowest pollen levels of the year in Minnesota.