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San Francisco, CA vs South San Francisco, CA weather comparison

San Francisco

CA

South San Francisco sees rain or snow on roughly 17 fewer days each year.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for San Francisco, CA and South San Francisco, CA
San FranciscoMetricSouth San Francisco
248 daysSunny daysclear or partly cloudy skies248 days
23 inPrecipitationper year19 in
71 daysWet daysrain or snow per year55 days
0 inSnowfallper year0 in
3 daysHot daysabove 90 °F4 days
0 daysFreezing nightsat or below 32 °F0 days
77%Humidityaverage relative79%
58 °FAverage temperatureyear round58 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

San FranciscoSouth San Francisco

Daily highs

60657075JanMarMayJulSepNovSan Francisco, Jan: 58 °FSan Francisco, Feb: 60 °FSan Francisco, Mar: 62 °FSan Francisco, Apr: 63 °FSan Francisco, May: 64 °FSan Francisco, Jun: 66 °FSan Francisco, Jul: 66 °FSan Francisco, Aug: 68 °FSan Francisco, Sep: 70 °FSan Francisco, Oct: 70 °FSan Francisco, Nov: 64 °FSan Francisco, Dec: 58 °FSouth San Francisco, Jan: 58 °FSouth San Francisco, Feb: 61 °FSouth San Francisco, Mar: 63 °FSouth San Francisco, Apr: 65 °FSouth San Francisco, May: 68 °FSouth San Francisco, Jun: 71 °FSouth San Francisco, Jul: 72 °FSouth San Francisco, Aug: 73 °FSouth San Francisco, Sep: 74 °FSouth San Francisco, Oct: 72 °FSouth San Francisco, Nov: 64 °FSouth San Francisco, Dec: 58 °F

Daily lows

455055JanMarMayJulSepNovSan Francisco, Jan: 47 °FSan Francisco, Feb: 48 °FSan Francisco, Mar: 49 °FSan Francisco, Apr: 50 °FSan Francisco, May: 51 °FSan Francisco, Jun: 53 °FSan Francisco, Jul: 55 °FSan Francisco, Aug: 56 °FSan Francisco, Sep: 56 °FSan Francisco, Oct: 54 °FSan Francisco, Nov: 51 °FSan Francisco, Dec: 47 °FSouth San Francisco, Jan: 45 °FSouth San Francisco, Feb: 46 °FSouth San Francisco, Mar: 47 °FSouth San Francisco, Apr: 49 °FSouth San Francisco, May: 51 °FSouth San Francisco, Jun: 53 °FSouth San Francisco, Jul: 55 °FSouth San Francisco, Aug: 56 °FSouth San Francisco, Sep: 56 °FSouth San Francisco, Oct: 53 °FSouth San Francisco, Nov: 49 °FSouth San Francisco, Dec: 45 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Francisco high586062636466666870706458
South San Francisco high586163656871727374726458
San Francisco low474849505153555656545147
South San Francisco low454647495153555656534945

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

San FranciscoSouth San Francisco
0.02.04.0JanMarMayJulSepNovSan Francisco, Jan: 4.5 inSan Francisco, Feb: 4.7 inSan Francisco, Mar: 3.5 inSan Francisco, Apr: 1.6 inSan Francisco, May: 0.8 inSan Francisco, Jun: 0.2 inSan Francisco, Jul: 0.0 inSan Francisco, Aug: 0.0 inSan Francisco, Sep: 0.1 inSan Francisco, Oct: 1.0 inSan Francisco, Nov: 2.2 inSan Francisco, Dec: 4.2 inSouth San Francisco, Jan: 3.7 inSouth San Francisco, Feb: 3.8 inSouth San Francisco, Mar: 2.9 inSouth San Francisco, Apr: 1.3 inSouth San Francisco, May: 0.7 inSouth San Francisco, Jun: 0.1 inSouth San Francisco, Jul: 0.0 inSouth San Francisco, Aug: 0.0 inSouth San Francisco, Sep: 0.1 inSouth San Francisco, Oct: 0.8 inSouth San Francisco, Nov: 1.8 inSouth San Francisco, Dec: 3.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Francisco4.54.73.51.60.80.20.00.00.11.02.24.2
South San Francisco3.73.82.91.30.70.10.00.00.10.81.83.4

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

San FranciscoSouth San Francisco
01020JanMarMayJulSepNovSan Francisco, Jan: 14 daysSan Francisco, Feb: 13 daysSan Francisco, Mar: 16 daysSan Francisco, Apr: 19 daysSan Francisco, May: 22 daysSan Francisco, Jun: 25 daysSan Francisco, Jul: 28 daysSan Francisco, Aug: 27 daysSan Francisco, Sep: 27 daysSan Francisco, Oct: 24 daysSan Francisco, Nov: 18 daysSan Francisco, Dec: 15 daysSouth San Francisco, Jan: 14 daysSouth San Francisco, Feb: 13 daysSouth San Francisco, Mar: 16 daysSouth San Francisco, Apr: 19 daysSouth San Francisco, May: 22 daysSouth San Francisco, Jun: 25 daysSouth San Francisco, Jul: 28 daysSouth San Francisco, Aug: 27 daysSouth San Francisco, Sep: 27 daysSouth San Francisco, Oct: 24 daysSouth San Francisco, Nov: 18 daysSouth San Francisco, Dec: 15 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Francisco141316192225282727241815
South San Francisco141316192225282727241815

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

San Francisco vs another city

See the full San Francisco, CA climate profile

More California cities

South San Francisco vs another city

See the full South San Francisco, CA climate profile

More California cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).