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South San Francisco climate
Typical historical weather for South San Francisco, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for South San Francisco.
Annual average
13.5°C
across all months
Warmest month
20.1°C
Sep average high
Coolest month
8.6°C
Dec average low
Annual rainfall
576mm
total per year
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
● Avg high● Avg low▮ Rainfall
Records on file
Hottest day
35.1°C
1 September 2017
Coldest day
3.1°C
2 January 2022
Wettest day
89.2mm
24 October 2021
Windiest day
10.9m/s
4 February 2024
See the detail: South San Francisco on 24 October 2021.