Places › San Diego, CA › September
San Diego in September
One of the best months — score 98 of 100
Typical September days in San Diego reach about 77°F with nights near 66°F; rain is rare.
Avg high
77°F
1991–2020 normal
Avg low
66°F
1991–2020 normal
Rain total
0.12 in
in a typical September
Rain days
1
days with at least 0.01 in
Daylight
12h 20m
at mid-September, computed
What to pack for San Diego in September
- Comfortable walking shoes — no special gear for a typical month.
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 Diego
JAN
66°F
Rain 6 days
Daylight 10h 13mFEB
66°F
Rain 7 days
Daylight 10h 58mMAR
67°F
Rain 6 days
Daylight 11h 53mAPR
69°F
Rain 4 days
Daylight 12h 56mMAY
70°F
Rain 2 days
Daylight 13h 49mJUN
72°F
Rain 1 days
Daylight 14h 17mJUL
75°F
★ Best
Rain 1 days
Daylight 14h 06mAUG
77°F
★ Best
Rain 0 days
Daylight 13h 21mSEP
77°F
★ Best
Rain 1 days
Daylight 12h 20mOCT
75°F
Rain 2 days
Daylight 11h 19mNOV
71°F
Rain 4 days
Daylight 10h 26mDEC
66°F
Rain 6 days
Daylight 10h 00m
66°F
Rain 6 days
Daylight 10h 13mFEB
66°F
Rain 7 days
Daylight 10h 58mMAR
67°F
Rain 6 days
Daylight 11h 53mAPR
69°F
Rain 4 days
Daylight 12h 56mMAY
70°F
Rain 2 days
Daylight 13h 49mJUN
72°F
Rain 1 days
Daylight 14h 17mJUL
75°F
★ Best
Rain 1 days
Daylight 14h 06mAUG
77°F
★ Best
Rain 0 days
Daylight 13h 21mSEP
77°F
★ Best
Rain 1 days
Daylight 12h 20mOCT
75°F
Rain 2 days
Daylight 11h 19mNOV
71°F
Rain 4 days
Daylight 10h 26mDEC
66°F
Rain 6 days
Daylight 10h 00m
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.