September 2025
San Francisco, CA
Average Temp
65.0°F
Record High
88.0°F
Record Low
56.0°F
Days Recorded
30 / 30
Historical September Records
Warmest September
1984 - 69.3°F
Coldest September
2012 - 58.1°F
Daily Temperature Range
High
Low
Average
Click any day to view hourly details
Daily Details
Data source: NOAA