Kentucky pollen and allergy seasons
Kentucky has a spring tree season and a heavy ragweed season, with Louisville often ranking among the harder cities for allergies.
Twelve month pollen calendar
What is active in September
Cities in Kentucky
No tracked cities yet for Kentucky.
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 Kentucky for ozone, dust, and smoke readings by city.
The Kentucky allergy season
Allergy levels in Kentucky peak in September, when ragweed pollen runs highest. The season moves through tree pollen around April, grass in May, weed pollen such as ragweed in September. Levels start to climb around March. The lowest pollen levels of the year arrive in January.
Common questions
When does allergy season start in Kentucky?
Pollen levels in Kentucky usually begin climbing in March and reach their highest point in September.
What is the worst month for allergies in Kentucky?
September is typically the worst month in Kentucky, driven by ragweed pollen.
When does ragweed season end in Kentucky?
Ragweed pollen in Kentucky usually fades by the end of November, after the first hard frost in colder areas.
When is the best time for allergies in Kentucky?
January usually brings the lowest pollen levels of the year in Kentucky.