Warm-summer Mediterranean climate
Climate South San Francisco - California
Annual high66ºF
Annual low51ºF
Precipitation20.65 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 56 | 44 | 4.19 |
| Feb | 60 | 46 | 4.06 |
| Mar | 62 | 48 | 2.96 |
| Apr | 65 | 49 | 1.29 |
| May | 68 | 52 | 0.47 |
| Jun | 71 | 54 | 0.11 |
| Jul | 72 | 55 | 0.00 |
| Aug | 73 | 56 | 0.04 |
| Sep | 74 | 56 | 0.17 |
| Oct | 70 | 53 | 0.95 |
| Nov | 63 | 49 | 2.38 |
| Dec | 57 | 45 | 4.03 |
- JanHigh 56ºFLow 44ºFPrecip 4.19 inch
- FebHigh 60ºFLow 46ºFPrecip 4.06 inch
- MarHigh 62ºFLow 48ºFPrecip 2.96 inch
- AprHigh 65ºFLow 49ºFPrecip 1.29 inch
- MayHigh 68ºFLow 52ºFPrecip 0.47 inch
- JunHigh 71ºFLow 54ºFPrecip 0.11 inch
- JulHigh 72ºFLow 55ºFPrecip 0.00 inch
- AugHigh 73ºFLow 56ºFPrecip 0.04 inch
- SepHigh 74ºFLow 56ºFPrecip 0.17 inch
- OctHigh 70ºFLow 53ºFPrecip 0.95 inch
- NovHigh 63ºFLow 49ºFPrecip 2.38 inch
- DecHigh 57ºFLow 45ºFPrecip 4.03 inch
Climate summary
What is the average weather in South San Francisco, California?
South San Francisco experiences a warm-summer climate with dry summers and wetter winters. The coastal influence moderates temperatures, leading to mild winters and mild summers. Notably, September is the warmest month, which is an atypical timing compared to most of the U.S. Rainfall is moderate overall, with frequent rain or drizzle common during the cooler season.
South San Francisco weather averages
Annual high66ºF
Annual low51ºF
Precipitation20.65 inch
Daily normals South San Francisco - California - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 57.4 | 43.9 | 0.13 | 0.13 |
| Jan 2 | 57.4 | 44.0 | 0.25 | 0.25 |
| Jan 3 | 57.4 | 44.0 | 0.37 | 0.37 |
| Jan 4 | 57.4 | 44.0 | 0.50 | 0.50 |
| Jan 5 | 57.4 | 44.0 | 0.63 | 0.63 |
| Jan 6 | 57.4 | 44.0 | 0.76 | 0.76 |
| Jan 7 | 57.5 | 44.1 | 0.89 | 0.89 |
| Jan 8 | 57.5 | 44.1 | 1.02 | 1.02 |
| Jan 9 | 57.5 | 44.1 | 1.16 | 1.16 |
| Jan 10 | 57.6 | 44.2 | 1.30 | 1.30 |
| Jan 11 | 57.6 | 44.2 | 1.44 | 1.44 |
| Jan 12 | 57.7 | 44.3 | 1.58 | 1.58 |
| Jan 13 | 57.7 | 44.3 | 1.71 | 1.71 |
| Jan 14 | 57.7 | 44.3 | 1.84 | 1.84 |
| Jan 15 | 57.8 | 44.4 | 1.96 | 1.96 |
| Jan 16 | 57.9 | 44.4 | 2.09 | 2.09 |
| Jan 17 | 57.9 | 44.5 | 2.21 | 2.21 |
| Jan 18 | 58.0 | 44.5 | 2.33 | 2.33 |
| Jan 19 | 58.1 | 44.6 | 2.45 | 2.45 |
| Jan 20 | 58.1 | 44.7 | 2.57 | 2.57 |
| Jan 21 | 58.2 | 44.7 | 2.69 | 2.69 |
| Jan 22 | 58.3 | 44.8 | 2.81 | 2.81 |
| Jan 23 | 58.4 | 44.8 | 2.93 | 2.93 |
| Jan 24 | 58.4 | 44.9 | 3.05 | 3.05 |
| Jan 25 | 58.5 | 44.9 | 3.16 | 3.16 |
| Jan 26 | 58.6 | 45.0 | 3.28 | 3.28 |
| Jan 27 | 58.7 | 45.1 | 3.40 | 3.40 |
| Jan 28 | 58.8 | 45.1 | 3.52 | 3.52 |
| Jan 29 | 58.9 | 45.2 | 3.64 | 3.64 |
| Jan 30 | 59.0 | 45.2 | 3.77 | 3.77 |
| Jan 31 | 59.1 | 45.3 | 3.89 | 3.89 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history South San Francisco - November 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Nov 1 | 64.9 | 50.0 | 0.20 |
| Nov 2 | – | – | – |
| Nov 3 | – | – | – |
| Nov 4 | – | – | – |
| Nov 5 | – | – | – |
| Nov 6 | – | – | – |
| Nov 7 | – | – | – |
| Nov 8 | – | – | – |
| Nov 9 | – | – | – |
| Nov 10 | – | – | – |
| Nov 11 | – | – | – |
| Nov 12 | – | – | – |
| Nov 13 | – | – | – |
| Nov 14 | – | – | – |
| Nov 15 | – | – | – |
| Nov 16 | – | – | – |
| Nov 17 | – | – | – |
| Nov 18 | – | – | – |
| Nov 19 | – | – | – |
| Nov 20 | – | – | – |
| Nov 21 | – | – | – |
| Nov 22 | – | – | – |
| Nov 23 | – | – | – |
| Nov 24 | – | – | – |
| Nov 25 | – | – | – |
| Nov 26 | – | – | – |
| Nov 27 | – | – | – |
| Nov 28 | – | – | – |
| Nov 29 | – | – | – |
| Nov 30 | – | – | – |
The data for November 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature64.9ºF · Nov 1
- Lowest max temperature64.9ºF · Nov 1
- Highest min temperature50.0ºF · Nov 1
- Lowest min temperature50.0ºF · Nov 1
Geo South San Francisco - California
Location
- Country
- United States
- State
- California
- County
- –
- City
- South San Francisco
- Zip Code
- 94080
- Elevation
- 16 ft
- Longitude
- -122.41
- Latitude
- 37.65
- ICAO
- –
- IATA
- –