Climate South San Francisco - California
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 56 | 60 | 62 | 65 | 68 | 71 |
| Average low in ºF Av. low Lo | 44 | 46 | 48 | 49 | 52 | 54 |
| Av. precipitation in inch Av. precip. Pre. | 4.19 | 4.06 | 2.96 | 1.29 | 0.47 | 0.11 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 72 | 73 | 74 | 70 | 63 | 57 |
| Average low in ºF Av. low Lo | 55 | 56 | 56 | 53 | 49 | 45 |
| Av. precipitation in inch Av. precip. Pre. | 0.00 | 0.04 | 0.17 | 0.95 | 2.38 | 4.03 |
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 Climate Graph - California Climate Chart
Daily normals South San Francisco - California - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 57.4 | 43.9 | 0.13 | 0.13 | 0.00 | 0.00 |
| 2 Jan | 57.4 | 44.0 | 0.25 | 0.25 | 0.00 | 0.00 |
| 3 Jan | 57.4 | 44.0 | 0.37 | 0.37 | 0.00 | 0.00 |
| 4 Jan | 57.4 | 44.0 | 0.50 | 0.50 | 0.00 | 0.00 |
| 5 Jan | 57.4 | 44.0 | 0.63 | 0.63 | 0.00 | 0.00 |
| 6 Jan | 57.4 | 44.0 | 0.76 | 0.76 | 0.00 | 0.00 |
| 7 Jan | 57.5 | 44.1 | 0.89 | 0.89 | 0.00 | 0.00 |
| 8 Jan | 57.5 | 44.1 | 1.02 | 1.02 | 0.00 | 0.00 |
| 9 Jan | 57.5 | 44.1 | 1.16 | 1.16 | 0.00 | 0.00 |
| 10 Jan | 57.6 | 44.2 | 1.30 | 1.30 | 0.00 | 0.00 |
| 11 Jan | 57.6 | 44.2 | 1.44 | 1.44 | 0.00 | 0.00 |
| 12 Jan | 57.7 | 44.3 | 1.58 | 1.58 | 0.00 | 0.00 |
| 13 Jan | 57.7 | 44.3 | 1.71 | 1.71 | 0.00 | 0.00 |
| 14 Jan | 57.7 | 44.3 | 1.84 | 1.84 | 0.00 | 0.00 |
| 15 Jan | 57.8 | 44.4 | 1.96 | 1.96 | 0.00 | 0.00 |
| 16 Jan | 57.9 | 44.4 | 2.09 | 2.09 | 0.00 | 0.00 |
| 17 Jan | 57.9 | 44.5 | 2.21 | 2.21 | 0.00 | 0.00 |
| 18 Jan | 58.0 | 44.5 | 2.33 | 2.33 | 0.00 | 0.00 |
| 19 Jan | 58.1 | 44.6 | 2.45 | 2.45 | 0.00 | 0.00 |
| 20 Jan | 58.1 | 44.7 | 2.57 | 2.57 | 0.00 | 0.00 |
| 21 Jan | 58.2 | 44.7 | 2.69 | 2.69 | 0.00 | 0.00 |
| 22 Jan | 58.3 | 44.8 | 2.81 | 2.81 | 0.00 | 0.00 |
| 23 Jan | 58.4 | 44.8 | 2.93 | 2.93 | 0.00 | 0.00 |
| 24 Jan | 58.4 | 44.9 | 3.05 | 3.05 | 0.00 | 0.00 |
| 25 Jan | 58.5 | 44.9 | 3.16 | 3.16 | 0.00 | 0.00 |
| 26 Jan | 58.6 | 45.0 | 3.28 | 3.28 | 0.00 | 0.00 |
| 27 Jan | 58.7 | 45.1 | 3.40 | 3.40 | 0.00 | 0.00 |
| 28 Jan | 58.8 | 45.1 | 3.52 | 3.52 | 0.00 | 0.00 |
| 29 Jan | 58.9 | 45.2 | 3.64 | 3.64 | 0.00 | 0.00 |
| 30 Jan | 59.0 | 45.2 | 3.77 | 3.77 | 0.00 | 0.00 |
| 31 Jan | 59.1 | 45.3 | 3.89 | 3.89 | 0.00 | 0.00 |
Weather history South San Francisco - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | 71.1 | 61.0 | 0.00 | - | - |
| 02 Sep | 73.0 | 62.1 | T | - | - |
| 03 Sep | 72.0 | 60.1 | 0.01 | - | - |
| 04 Sep | 72.0 | 57.9 | 0.00 | - | - |
| 05 Sep | 73.9 | 57.9 | 0.00 | - | - |
| 06 Sep | 72.0 | 59.0 | 0.00 | - | - |
| 07 Sep | 82.9 | 55.9 | 0.00 | - | - |
| 08 Sep | 87.1 | 61.0 | 0.00 | - | - |
| 09 Sep | 93.9 | 66.0 | 0.00 | - | - |
| 10 Sep | 84.9 | 60.1 | 0.00 | - | - |
| 11 Sep | 73.0 | 60.1 | 0.00 | - | - |
| 12 Sep | 71.1 | 60.1 | 0.00 | - | - |
| 13 Sep | 71.1 | 59.0 | 0.00 | - | - |
| 14 Sep | - | - | - | - | - |
| 15 Sep | - | - | - | - | - |
| 16 Sep | 66.0 | 57.9 | 0.00 | - | - |
| 17 Sep | 72.0 | 60.1 | 0.00 | - | - |
| 18 Sep | - | - | - | - | - |
| 19 Sep | - | - | - | - | - |
| 20 Sep | - | - | - | - | - |
| 21 Sep | - | - | - | - | - |
| 22 Sep | - | - | - | - | - |
| 23 Sep | - | - | - | - | - |
| 24 Sep | - | - | - | - | - |
| 25 Sep | - | - | - | - | - |
| 26 Sep | - | - | - | - | - |
| 27 Sep | - | - | - | - | - |
| 28 Sep | - | - | - | - | - |
| 29 Sep | - | - | - | - | - |
| 30 Sep | - | - | - | - | - |
Past weather South San Francisco
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 75.7 ºF | 56 ºF | |
| Average low temperature Av. low temp. | 59.9 ºF | 44 ºF | |
| Total precipitation Total precip. | 0.01 inch | 4.19 inch | |
| Total snowfall Total snowfall | - inch | 0 inch | |
| Highest max temperature Highest max temp. | 93.9 ºF | - | |
| Lowest max temperature Lowest max temp. | 66.0 ºF | - | |
| Highest min temperature Highest min temp. | 66.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 55.9 ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo South San Francisco - California
| Country | United States | |
|---|---|---|
| State | California | |
| County | - | |
| City | South San Francisco | |
| Zip Code | 94080 | |
| Longitude | -122.41 dec. degr. | |
| Latitude | 37.65 dec. degr. | |
| Altitude - Elevation | 16ft | |
| ICAO | - | |
| IATA | - |
Date and Time South San Francisco - California
| Local Time | 03:53 AM | |
|---|---|---|
| Sunrise | 06:55 AM | |
| Sunset | 07:09 PM | |
| Day/Night | Night | |
| Timezone | Pacific Daylight Time | |
| Timezone DB | America - Los Angeles |
Map of South San Francisco - California
USGS National Map — Open interactive map
South San Francisco weather averages
| Annual high temperature | 66ºF |
| Annual low temperature | 51ºF |
| Average annual precip. | 20.65 inch |
Station Data
Monthly averages South San Francisco
Longitude: -122.408, Latitude: 37.6547
Average weather South San Francisco, CA - 94080
Monthly: 1991-2020 normals
History: 2008-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...