Dr. Anlin Xu
Good Samaritan Hospital-San Jose
California Pollen Count Today
Check today's pollen count by city in California. Explore local allergy forecasts, monitor common seasonal allergens, and use city-level trends to plan around high pollen days.
Allergy Ava organizes statewide and local pollen information so you can compare conditions, anticipate seasonal flare-ups, and find relevant allergy forecast pages faster.
Today's pollen count in California
Pollen levels in California can vary by city, weather, vegetation, and season. Choose a local forecast below to see the current allergy index, main allergen, and 5-day outlook for cities including Los Angeles, San Francisco, San Diego, Sacramento, San Jose, Long Beach.
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Local allergy care
Allergists near California
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.
Dr. A.M. Aminian
Allergy Institute
Dr. Akansha Ganju
Latitude Food Allergy Care
Dr. Aleksandra Bokszczanin-Knosala
Kaiser Permanente San Jose Medical Offices
Dr. Alexander Greiner
Rady Children's Specialists of San Diego
Dr. Ami Philipp
UCLA Health
Showing 6 of 162 published allergist profiles in this area.
About Pollen in California
California allergy sufferers can use this page to monitor pollen trends and find relevant city forecasts when available. Pollen levels vary by season, with tree pollen often peaking in spring, grass pollen becoming more active in late spring and summer, and weed pollen, especially ragweed, remaining a concern in late summer and fall.
Use Allergy Ava's city-level forecasts to plan outdoor activities, manage medication timing, and stay informed about the allergens most prevalent in your area. Our data is updated regularly to give you the most accurate picture of current conditions.
Nearby state pollen forecasts
Comparing nearby states can help you understand regional allergy shifts, seasonal pollen timing, and conditions that may affect travel or outdoor plans.
California pollen forecast by region
California allergy conditions vary sharply between coastal, inland, and valley regions. Someone searching for a California pollen forecast may be comparing Los Angeles, San Diego, Sacramento, San Jose, or San Francisco because each area has different vegetation, moisture patterns, and seasonal timing.
Tree pollen may rise in spring, grasses can become more active in late spring and early summer, and dry inland conditions may extend irritation for sensitive allergy sufferers. Checking California pollen counts by city helps account for regional microclimates rather than relying on one statewide pattern.
Frequently asked questions about California pollen forecasts
Why can California pollen look different across cities on the same day?
California has strong microclimates. A cool marine layer in San Francisco or San Diego, valley heat in Fresno or Sacramento, and basin wind around Los Angeles can all change which pollen is airborne and how irritating the day feels.
When should Los Angeles and San Diego residents start watching tree pollen?
Southern California can see tree pollen build in late winter and early spring, especially after warm stretches. Oak, olive, mulberry, ash, sycamore, cedar, and ornamental landscape trees can all contribute depending on the neighborhood.
Why are Sacramento and Fresno different from coastal California allergy forecasts?
Sacramento and Fresno sit in the Central Valley, where warmer inland air, agriculture, grasses, disturbed soil, and valley air stagnation can produce a more inland pollen pattern than coastal cities with fog or ocean breezes.
Does a wet winter make California allergies worse later?
It can. Rain may briefly clear pollen from the air, but a wet winter or spring can also support more plant growth. When conditions turn warm, dry, or windy afterward, grasses, weeds, and mold-related irritation may become more noticeable.