Pollen Level
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Air Quality
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Gathering pollen, air quality, and weather data for you.
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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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Weather
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Los Altos's allergy season varies with proximity to the coast. Coastal breezes help, but residents of Los Altos, CA can still experience significant pollen from February through October, especially during dry, warm spells.
Right now: May transitions to grass pollen in Los Altos. 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 Los Altos 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.
CAUTION
Limit exposure
Tree pollen is very high at 400 grains/m³. Limit outdoor time and take precautions if you go out.
Lower-risk hours: 11:00-13:00
Pollen Level
Very High
400 grains/m³ · Tree
Air Quality
AQI 24
Good
Weather
54°F
Cloudy · 84% humidity · 7 mph wind
~400 grains/m³
~250 grains/m³
~5 grains/m³