Maine pollen and allergy seasons
Maine has a late compressed season, with tree pollen in spring, grass in early summer, and a lighter ragweed season than states to the south.
Twelve month pollen calendar
What is active in September
Cities in Maine
No tracked cities yet for Maine.
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 Maine for ozone, dust, and smoke readings by city.
The Maine allergy season
Allergy levels in Maine peak in May, when birch pollen runs highest. The season moves through tree pollen around May, 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 Maine?
Pollen levels in Maine usually begin climbing in April and reach their highest point in May.
What is the worst month for allergies in Maine?
May is typically the worst month in Maine, driven by birch pollen.
When does ragweed season end in Maine?
Ragweed pollen in Maine usually fades by the end of October, after the first hard frost in colder areas.
When is the best time for allergies in Maine?
January usually brings the lowest pollen levels of the year in Maine.