CA pollen report
Los Angeles Pollen Report
PollyMap is actively seeking a qualified local collection partner in Los Angeles. This guide uses regional climate and historical allergen data while we recruit a local host.
Collection coming soon to Los Angeles
PollyMap is actively recruiting a verified local partner in Los Angeles. Be the first to know — or apply to be the partner.
Pollen patterns in Los Angeles
In Los Angeles, tree pollen — including Oak, Olive, Cypress — typically dominates from late winter through spring. Bermuda grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Top trees
- Oak
- Olive
- Cypress
- Acacia
- Sycamore
Top grasses
- Bermuda
- Rye
- Fescue
Top weeds
- Ragweed
- Sagebrush
- Pigweed
Top molds
- Cladosporium
- Alternaria
- Penicillium
Los Angeles pollen calendar
Typical monthly intensity across the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tree | ||||||||||||
| grass | ||||||||||||
| weed | ||||||||||||
| mold |
Historical reports
Cities near Los Angeles
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
When is allergy season in Los Angeles?
In Los Angeles, allergy season starts with tree pollen in late winter and early spring, transitions to grass pollen in May and June, and ends with weed pollen — primarily ragweed and sagebrush — from August through October.
What pollen is highest in Los Angeles?
The most prevalent local pollens in Los Angeles include Oak, Olive, Cypress in the spring season.
What months are worst for allergies in Los Angeles?
Most Los Angeles allergy sufferers report the worst symptoms during peak tree pollen in March-May and again during ragweed season in September.
Does Los Angeles have mold allergies?
Yes. Los Angeles's climate supports Cladosporium and Alternaria spore exposure, with counts typically peaking in the warm and humid months.
Why are allergies bad in Los Angeles?
Local geography, climate, and seasonal plant cycles all influence allergen load in Los Angeles. The combination of regional vegetation and weather creates predictable spring and fall pollen peaks.
Is there a local pollen collection site in Los Angeles?
Not yet. PollyMap is actively seeking a qualified local allergy clinic or environmental health partner in Los Angeles to host weekly pollen collection.
How can my clinic become a PollyMap partner in Los Angeles?
Clinics in Los Angeles can apply to become the official PollyMap collection partner. Approved partners receive PollyKits weekly, conduct 24-48 hour collections, and mail samples back for microscope analysis.
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