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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Fremont's allergy season varies with proximity to the coast. Coastal breezes help, but residents of Fremont, CA can still experience significant pollen from February through October, especially during dry, warm spells.
Right now: March is heavy tree pollen month in Fremont. Multiple tree species overlap, driving counts high.
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 Fremont 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.
Pollen Level
High
250 grains/m³ · Tree
~250 grains/m³
~50 grains/m³
~5 grains/m³
Air Quality
AQI 32
Good
Weather
60°F
Sunny · 62% humidity · 1 mph wind
Hourly pollen risk is estimated from weather trends when no live hourly pollen feed is available.
CAUTION
Tree pollen is high. If you need to be outside, aim for the safest window later in the day and keep precautions in place.
Lower-risk hours: 11:00-13:00