CA pollen report
Fremont Pollen Report
Fremont stretches from the bay shore to the East Bay foothills — coast live oak and bay laurel country with grass-covered hills between. Oak and bay drive the spring, hillside grasses pollinate into early summer, and the mild, Mediterranean climate keeps something in bloom nearly year-round. Winter rains feed a mold season of their own.
Collection coming soon to Fremont
PollyMap is actively recruiting a verified local partner in Fremont. Be the first to know — or apply to be the partner.
What drives allergies in Fremont
Trees: oak, bay, and acacia (January – May)
Coast live oak (Quercus agrifolia) is the signature spring allergen, with California bay laurel, acacia, and ornamental birches contributing from winter onward.
Grasses: hillside grasses (March – June)
The East Bay hills' wild oat and rye grass pollinate through late spring, peaking in May.
Weeds: modest (August – October)
Ragweed is lighter than inland; sagebrush and pigweed contribute in late summer and fall.
Mold: winter rains
The wet season keeps Alternaria and Cladosporium active from late fall through early spring.
Historical reports
Cities near Fremont
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Fremont today?
PollyMap publishes real, microscope-verified pollen counts for Fremont — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in Fremont right now?
Fremont's worst stretches are March–April (oak, bay), May (grasses), and the winter mold season. The measured reports on this page show today's actual levels.
When is allergy season in Fremont?
Nearly year-round: trees from late winter through spring, grasses into early summer, weeds in the fall, and mold through the wet months.
Why do allergies vary across Fremont neighborhoods?
The bay shore runs damper (more mold), while the foothill neighborhoods carry heavier oak and grass pollen — the microclimates are real.
Are you an allergy clinic in Fremont? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of Fremont, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the Fremont metro — like a franchise territory. Fremont has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Fremont yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
Fremont, Newark, Union City, and Milpitas each make natural PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Fremont pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of Fremont