CA pollen report
Santa Rosa Pollen Report
Santa Rosa sits in the heart of Sonoma County — oak woodlands, vineyards, and grass-covered hills under a Mediterranean climate. Oak and bay laurel drive the spring, hillside grasses pollinate into early summer, and the region's wet winters keep mold active. The mix of forest and open country makes for a long, layered allergy calendar.
Collection coming soon to Santa Rosa
PollyMap is actively recruiting a verified local partner in Santa Rosa. Be the first to know — or apply to be the partner.
What drives allergies in Santa Rosa
Trees: oak, bay, and birch (February – May)
Coast live oak (Quercus agrifolia) and valley oak are the signature spring allergens; California bay laurel and birch contribute from late winter.
Grasses: hillside grasses (March – June)
Sonoma's grass-covered hills — wild oats and rye — 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
Sonoma's wet winters keep Alternaria and Cladosporium active, with peaks during the rainy season and vineyard leaf drop.
Historical reports
Cities near Santa Rosa
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Santa Rosa today?
PollyMap publishes real, microscope-verified pollen counts for Santa Rosa — 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 Santa Rosa right now?
Santa Rosa'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 Santa Rosa?
Nearly year-round: trees from late winter through spring, grasses into early summer, weeds in the fall, and mold through the wet months.
Do vineyards cause allergies in Sonoma County?
Grapevines are wind-pollinated but mild — the real drivers are the oak woodlands and grass hillsides surrounding the vineyards, plus winter mold.
Are you an allergy clinic in Santa Rosa? 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 Santa Rosa, 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 Santa Rosa metro — like a franchise territory. Santa Rosa has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Santa Rosa 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.
Santa Rosa, Rohnert Park, Petaluma, and Windsor each make natural PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Santa Rosa 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 Santa Rosa