Is San Francisco hot in August?
Days are typically mild at 20.3°C, while nights average 13.2°C.
United States · 1991–2020 normal
San Francisco in
August.
Typical August weather in San Francisco: 20.3°C by day, 13.2°C at night, 1 mm of rain over 0.2 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high20.3°C
Typical low13.2°C
Rain1 mm
Wet days0.2
In the year-round weather comparison, August scores 85 out of 100 (September leads the year at 89). Daylight is calculated as 13 h 37 from latitude 37.77°. Open-water sea temperature is 14.2°C (21 km from the place centre).
August at a glance
What is San Francisco like in August?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 1 mm across about 0 wet days.
How much daylight is there?
There are about 13 h 37 between sunrise and sunset at mid-month, calculated from the place latitude.
Is August a good time to visit?
August ranks 3 of 12 in our weather comparison; September ranks first.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5391959
- NOAA station
- USW00023272 · SAN FRANCISCO DWTN
- Station distance
- 0.8 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for San Francisco is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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