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