Pollen in San Francisco, CA

About pollen in San Francisco

Pollen is essentially quiet across San Francisco today. Tree pollen, the only category with a reading, sits at none, meaning there is nothing of note in the air right now. For most residents, including those who usually deal with seasonal sensitivities, today should be a comfortable one with little to no pollen-related irritation expected. Looking ahead, conditions are expected to remain calm over the next few days, with tree pollen holding at a negligible level. This fits the time of year, since mid-November falls well outside the active bloom period for local trees such as Lophostemon, Pyrus, Washingtonia, Plane, and Eriobotrya, which typically contribute more noticeably to pollen counts in spring. For now, residents can expect a lull before activity picks back up later in the seasonal cycle.

What to do today

• Pollen is minimal today, so it's a great time to be outside.
• No special pollen precautions are needed right now.

Tree map

Every dot is a tree near San Francisco, colored by how allergenic it is. Click one for its details, and zoom in for a closer look.

Top tree-pollen sources

The local tree genera behind today's pollen near San Francisco. Each bar is that genus's share of the tree pollen.

Meet the trees near you

Get to know the tree types growing around San Francisco: what each looks like, how allergenic it is, and when it blooms.

Monterey pine

Pinus radiata

Allergenicity 1/4Blooms spring

Sycamore london plane

Platanus acerifolia

Allergenicity 4/4Blooms spring

Ornamental cherry

Prunus serrulata

Allergenicity 1/4Blooms spring

Kwanzan flowering cherry

Prunus serrulata

Allergenicity 1/4Blooms spring

Cherry plum

Prunus cerasifera

Allergenicity 1/4Blooms spring

Olive tree

Olea europaea

Allergenicity 5/4Blooms spring,summer

American elm

Ulmus americana

Allergenicity 3/4Blooms spring

Siberian elm

Ulmus pumila

Allergenicity 3/4Blooms spring

Juniper

Juniperus chinensis

Allergenicity 5/4Blooms winter,spring

Maidenhair tree

Ginkgo biloba

Allergenicity 1/4Blooms spring

Ornamental pear

Pyrus calleryana

Allergenicity 1/4Blooms spring

Glossy privet

Ligustrum lucidum

Allergenicity 2/4Blooms spring

Italian stone pine

Pinus pinea

Allergenicity 1/4Blooms spring

Monterey cypress

Cupressus macrocarpa

Allergenicity 4/4Blooms winter,spring

Chinese hackberry

Celtis sinensis

Allergenicity 3/4Blooms spring

Canary island pine

Pinus canariensis

Allergenicity 1/4Blooms spring

Common questions

What is the pollen count in San Francisco, CA today?

San Francisco, CA has no notable tree, grass, or weed pollen today.

What plants are causing allergies in San Francisco, CA?

The main sources right now are Lophostemon, Pyrus, Washingtonia, Plane, and Eriobotrya.