Pollen Level
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Air Quality
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Pollen Level
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Air Quality
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Gathering pollen, air quality, and weather data for you.
Gathering pollen, air quality, and weather data for you.
Pollen Level
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Air Quality
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San Francisco's allergy season varies with proximity to the coast. Coastal breezes help, but residents of San Francisco, CA can still experience significant pollen from February through October, especially during dry, warm spells.
Right now: May transitions to grass pollen in San Francisco. Inland areas see higher counts than coastal neighborhoods.
Spring
Feb – May
Tree pollen starts early — alder, birch, and oak are primary triggers.
Summer
May – Jul
Grass pollen peaks. Inland valleys see significantly higher counts than the coast.
Fall
Aug – Oct
Ragweed and sagebrush in drier areas. Coastal cities see lower counts.
Ocean breezes near San Francisco can help clear pollen, but inland valleys trap allergens. Wildfire season also degrades air quality significantly. PollenTracker monitors both pollen and AQI to give you the full picture.
Open another nearby forecast without going back to the map.
YES
Tree pollen is moderate with calm conditions. Most people can head out comfortably.
Best hours: 12:00-14:00
Pollen Level
Medium
50 grains/m³ · Tree
Air Quality
AQI 43
Good
Weather
56°F
Cloudy · 77% humidity · 12 mph wind
~50 grains/m³
~50 grains/m³
~5 grains/m³