Very Low Pollen in San Francisco, CA

About pollen in San Francisco

Pollen levels around San Francisco are quiet today. Tree pollen is essentially absent, and weeds are registering only a very low presence, meaning most people should be able to go about their day without much notice. Overall, this is a mild stretch for allergy sufferers, with little in the air to trigger symptoms. Looking ahead, this calm pattern is expected to hold through the next several days, with tree pollen staying negligible and weeds remaining at a similarly low, steady level. This fits the season, as local trees such as Lophostemon, Pyrus, Washingtonia, Plane, and Eriobotrya are well past their spring pollen release and grass season has also wound down. Late summer in the city tends to favor weed pollen over tree or grass sources, though even that influence remains mild for now.

What to do today

• Pollen levels are very low right now. It's a great day to enjoy the outdoors!

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 is at a very low 1 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. The five-day outlook holds steady around 1 of 5.

Is weed pollen high in San Francisco, CA right now?

Weed pollen is very low today at 1 of 5, and it's past its peak season. Most people won't notice it.

What plants are causing allergies in San Francisco, CA?

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