CA pollen report
San Diego Pollen Report
PollyMap is actively seeking a qualified local collection partner in San Diego. This guide uses regional climate and historical allergen data while we recruit a local host.
Collection coming soon to San Diego
PollyMap is actively recruiting a verified local partner in San Diego. Be the first to know — or apply to be the partner.
Pollen patterns in San Diego
In San Diego, 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
San Diego 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 San Diego
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
When is allergy season in San Diego?
In San Diego, 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 San Diego?
The most prevalent local pollens in San Diego include Oak, Olive, Cypress in the spring season.
What months are worst for allergies in San Diego?
Most San Diego allergy sufferers report the worst symptoms during peak tree pollen in March-May and again during ragweed season in September.
Does San Diego have mold allergies?
Yes. San Diego's climate supports Cladosporium and Alternaria spore exposure, with counts typically peaking in the warm and humid months.
Why are allergies bad in San Diego?
Local geography, climate, and seasonal plant cycles all influence allergen load in San Diego. The combination of regional vegetation and weather creates predictable spring and fall pollen peaks.
Is there a local pollen collection site in San Diego?
Not yet. PollyMap is actively seeking a qualified local allergy clinic or environmental health partner in San Diego to host weekly pollen collection.
How can my clinic become a PollyMap partner in San Diego?
Clinics in San Diego 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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