Louisville, KY Grass Pollen
Grass pollen in Louisville usually peaks around May to June, reaching High at its worst. Louisville sits in the Ohio River Valley, where humid air and river bottoms make for a heavy allergy year: maple and oak in spring, grass in summer, and a strong ragweed fall.
Grass pollen runs high from May into summer in the Ohio Valley's warmth.
Grass in Louisville today
Tuesday, July 28, 2026
Grass pollen by month in Louisville
How grass usually runs across the year. The current month is outlined.
Managing grass season in Louisville
If grass is your trigger, start a daily antihistamine like cetirizine (Zyrtec) or loratadine (Claritin) a week or two before the May to June peak, rather than waiting for symptoms. Keep windows closed on high-count mornings, shower and change clothes after time outside, and run the AC on recirculate in the car.
When symptoms don't ease with over-the-counter medicine, an allergist in Kentucky can test whether grass is really what you react to and talk through longer-term options like allergy shots.
Sources
More pollen in Louisville
- Louisville ragweed pollen — peaks September.
- Louisville oak pollen — peaks April.
- Louisville maple pollen — peaks March.
- Louisville pollen calendar — every allergen, month by month.
- Louisville pollen count today — live tree, grass, and weed levels with a 5-day forecast.
- Kentucky pollen season — the statewide calendar and other cities.
Get Louisville pollen alerts
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Sign up for free alertsSeasonal pattern based on Kentucky pollen data and local sources. Today's reading updated daily. MyPollenPal