Pollen in San Mateo, CA
No notable pollen right now.
Last updated July 28, 2026
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About pollen in San Mateo
Pollen activity in San Mateo is quiet today, with conditions calm across the board. Trees, grasses, and weeds are all in a low point of their cycles right now, so most residents should notice little to nothing in the way of symptoms. Looking ahead, expect this mild stretch to continue over the next few days, typical for late July in the Bay Area. Local trees like oak and birch finished their heavier pollen release back in spring, and grass pollen — usually the main concern into early summer — is winding down as well. Ragweed and other late-summer weeds haven't yet ramped up, so this is generally a lighter period for allergy sufferers before fall weed pollen becomes more of a factor.
Common questions
- What is the pollen count in San Mateo, CA today?
- San Mateo, CA has no notable tree, grass, or weed pollen today.