Very Low Pollen in San Francisco, CA

About pollen in San Francisco

Pollen activity around San Francisco remains quiet today. Tree pollen is essentially absent, while both grass and weed pollen are sitting at very low levels. Overall, this is a day where most people, even those with sensitivities, are unlikely to notice much in the way of symptoms. Looking ahead, conditions should stay much the same over the next few days, with grass pollen holding steady at a very low level and no significant change expected elsewhere. This tracks with the season: local trees such as Lophostemon, Pyrus, Washingtonia, Plane, and Eriobotrya are well past their spring peak and contributing little right now, and while weeds can linger into early fall, current levels suggest a calm stretch ahead rather than any meaningful uptick.

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 grass pollen. The five-day outlook holds steady around 1 of 5.

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

Grass 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.