Los Angeles, CA Grass Pollen
Grass pollen in Los Angeles usually peaks around April to May, reaching High at its worst. Los Angeles has a mild, drawn-out allergy season rather than a sharp one: olive and oak in spring, mulberry alongside them, grass through late spring, and scattered weed pollen much of the year.
Grass pollen runs high in late spring across lawns and open space around the basin.
Grass in Los Angeles today
Tuesday, July 28, 2026
Grass pollen by month in Los Angeles
How grass usually runs across the year. The current month is outlined.
Managing grass season in Los Angeles
If grass is your trigger, start a daily antihistamine like cetirizine (Zyrtec) or loratadine (Claritin) a week or two before the April to May 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 California can test whether grass is really what you react to and talk through longer-term options like allergy shots.
Sources
More pollen in Los Angeles
- Los Angeles oak pollen — peaks April.
- Los Angeles mulberry pollen — peaks March and April.
- Los Angeles olive pollen — peaks March to April.
- Los Angeles ragweed pollen — peaks August to September.
- Los Angeles pollen calendar — every allergen, month by month.
- Los Angeles pollen count today — live tree, grass, and weed levels with a 5-day forecast.
- California pollen season — the statewide calendar and other cities.
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Sign up for free alertsSeasonal pattern based on California pollen data and local sources. Today's reading updated daily. MyPollenPal