Temperature range
Typical highs and lows
High22.0°C
Low6.6°C
The broad yearly range between warm daytime highs and the coolest overnight lows.
United States San Francisco, United States
San Francisco has a mild year-round climate with average temperatures ranging from 13°C / 56°F in January to 22°C / 72°F in September.
Precipitation is distributed throughout the year, averaging 53 mm / 2.1 inches monthly, peaking in December (137 mm / 5.4 inches) and reaching its lowest in July (0 mm / 0 inches).
The UV index ranges from 3 in December to 8 in July, so strong sun protection is essential during summer months.
The longest days occur in June with around 14.7 hours of daylight, while December has the shortest days at about 9.6 hours.
Trip planning
Plan your trip
Find the best dates. Understand the conditions. Pack with confidence.
Climate overview
Climate at a glance
The big-picture stats that matter for planning your visit to San Francisco.
Rain pattern
Wettest point of the year
137 mm
December carries the highest typical rainfall load.
Sun exposure
Typical peak UV band
High (6.4)
A fast read on how strong midday sun typically gets across the year.
Daylight window
Seasonal daylight range
10 hrsto15 hrs
Useful for gauging how much sightseeing time you get in shorter versus longer seasons.
Wind profile
Typical breeze strength
15 km/h
June is typically the breeziest month.
Humidity
Typical moisture range
73 %to83 %
A quick signal for how dry, comfortable, or heavy the air tends to feel.
When should I go?
Our top-rated months for visiting San Francisco, based on long-term weather comfort and conditions
Typical weather by month
Compare all monthsTip: click on a card to see detailed daily weather averages for that month.
How San Francisco compares
See how it ranks against the rest of United States for key metrics.
HOTTEST (AVG)
in United States
#14 / 20
COOLEST (AVG)
in United States
#8 / 20
WETTEST (TOTAL)
in United States
#14 / 20
WINDIEST (AVG)
in United States
#3 / 20
HIGHEST UV
in United States
#13 / 20
MOST HUMID
in United States
#3 / 20
Short term outlook
Visiting soon? Here's the next 7 days of weather for San Francisco, or see an hourly breakdown for the next 14 days.
Travel planning FAQ
Frequently asked questions
Quick answers to the weather questions you ask the most.
How does the weather in San Francisco feel over the year?
Across the year, daytime highs average about 18°C (64°F), with nights near 10°C (50°F). Overall it feels mild by day and cool after dark. Daylight is fairly typical, with enough time for sightseeing. Expect a mix of sun and cloud across the year.
When is the best time to visit San Francisco for dry weather?
When is sun exposure strongest in San Francisco?
UV tends to peak in July, when UV levels frequently reach very high levels (around 8), so strong sun protection is essential, especially around midday.
Is San Francisco a windy place?
Across the year, average winds sit around 15 km/h (9 mph), with gusts on windier days up to about 64 km/h (40 mph). Overall it is it is a notably windy place, and strong gusts are fairly common.
How much daylight does San Francisco get?
On average, days offer about 12 hours of daylight. Daylight is fairly typical, with enough time for sightseeing.