Very Low Pollen in San Francisco, CA

About pollen in San Francisco

Pollen activity around San Francisco is quiet today. Tree pollen is absent, and grass pollen is only at a very low level, so most people should notice little to nothing in the way of symptoms. If you're particularly sensitive to grass, you might catch a faint trace, but overall conditions are calm and easy on the sinuses. Looking ahead, the next couple of days should bring more of the same, with grass staying at a similarly low, barely noticeable level and tree pollen remaining absent. This lull fits the season: local trees such as Lophostemon, Pyrus, Washingtonia, Plane, and Eriobotrya typically finish their heavier pollen release earlier in the year, so by midsummer they contribute little. Grass pollen can linger into early summer before tapering off, which is consistent with the mild levels being seen now. For the time being, San Francisco's air is offering a welcome break for allergy sufferers.

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.