Places › San Francisco, CA › September
San Francisco in September
One of the best months — score 98 of 100
Typical September days in San Francisco reach about 70°F with nights near 56°F; rain is rare.
Avg high
70°F
1991–2020 normal
Avg low
56°F
1991–2020 normal
Rain total
0.10 in
in a typical September
Rain days
1
days with at least 0.01 in
Daylight
12h 23m
at mid-September, computed
What to pack for San Francisco in September
- A light jacket or fleece for evenings.
Every packing line is triggered by a number on this page — the rules are on How we pick.
September vs. the alternatives
The whole year in San Francisco
JAN
58°F
Rain 11 days
Daylight 9h 49mFEB
60°F
Rain 11 days
Daylight 10h 44mMAR
62°F
Rain 11 days
Daylight 11h 50mAPR
63°F
Rain 7 days
Daylight 13h 07mMAY
64°F
★ Best
Rain 4 days
Daylight 14h 11mJUN
66°F
★ Best
Rain 2 days
Daylight 14h 46mJUL
66°F
★ Best
Rain 1 days
Daylight 14h 32mAUG
68°F
Rain 1 days
Daylight 13h 37mSEP
70°F
Rain 1 days
Daylight 12h 23mOCT
70°F
Rain 4 days
Daylight 11h 09mNOV
64°F
Rain 8 days
Daylight 10h 05mDEC
58°F
Rain 12 days
Daylight 9h 34m
58°F
Rain 11 days
Daylight 9h 49mFEB
60°F
Rain 11 days
Daylight 10h 44mMAR
62°F
Rain 11 days
Daylight 11h 50mAPR
63°F
Rain 7 days
Daylight 13h 07mMAY
64°F
★ Best
Rain 4 days
Daylight 14h 11mJUN
66°F
★ Best
Rain 2 days
Daylight 14h 46mJUL
66°F
★ Best
Rain 1 days
Daylight 14h 32mAUG
68°F
Rain 1 days
Daylight 13h 37mSEP
70°F
Rain 1 days
Daylight 12h 23mOCT
70°F
Rain 4 days
Daylight 11h 09mNOV
64°F
Rain 8 days
Daylight 10h 05mDEC
58°F
Rain 12 days
Daylight 9h 34m
Averages are the 1991–2020 climate normals (NOAA National Centers for Environmental Information) for the station named on each page. Rain days = days with at least 0.01 in of precipitation. Daylight is computed for the middle of the month.