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South San Francisco, California Weather Forecast
South San Francisco, California Weather
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Weather Forecast for South San Francisco, California : San Mateo County
Issued: 2:08 am PST Dec 18, 2025 Latitude: 37.654656 Longitude: -122.4077498 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Morning Fog on Today 40% chance of rain on Tonight 80% chance of rain on Friday 80% chance of rain on Saturday 100% chance of rain on Sunday Rain on Monday 70% chance of rain on Tuesday 70% chance of rain on Wednesday
High: 60°F Low: 51°F High: 61°F High: 60°F High: 60°F High: 58°F High: 57°F High: 57°F
Low: 52°F Low: 53°F Low: 53°F Low: 49°F Low: 49°F  
Morning Fog Rain Rain Rain Rain Rain Rain Rain
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Current Conditions at
SAN FRANCISCO - (KSFO)
52°
Cloudy
as of 3:56 AM PST
Rel. Humidity: 87%
Dew Point: 48°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: IFR
Wind Data
5 MPH
150° Southeast
Cloud Level(s): Few at 500ft, Broken at 700ft, Solid Overcast at 1000ft
Current Conditions at
OAKLAND - (KOAK)
52°
Cloudy
Shallow Fog
as of 3:53 AM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 7 Miles
Pressure: 30.14 in.
Flight Rule: LIFR
Wind Data
Calm
Cloud Level(s): Few at 100ft, Broken at 400ft, Solid Overcast at 700ft
Current Conditions at
SAN CARLOS - (KSQL)
46°
Cloudy
as of 3:55 AM PST
Rel. Humidity: 100%
Dew Point: 46°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
Calm
Current Conditions at
HAYWARD - (KHWD)
52°
Cloudy
as of 3:54 AM PST
Rel. Humidity: 100%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.13 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 500ft
Morning Fog on Today Today... Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 60. Calm wind.
40% chance of rain Tonight Tonight... A 40 percent chance of rain, mainly after 10pm. Mostly cloudy, with a low around 51. Calm wind becoming south southwest around 5 mph after midnight.
80% chance of rain Friday Friday... Rain, mainly after 10am. High near 61. South wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
90% chance of rain Friday Night Friday Night... Rain, mainly before 4am. Low around 52. South southwest wind 7 to 11 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
80% chance of rain Saturday Saturday... Rain, mainly after 10am. High near 60. South wind around 6 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
90% chance of rain Saturday Night Saturday Night... Rain. Low around 53. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
100% chance of rain Sunday Sunday... Rain. High near 60. Chance of precipitation is 100%.
Rain on Sunday Night Sunday Night... Rain. Cloudy, with a low around 53.
Rain on Monday Monday... Rain. Cloudy, with a high near 58.
70% chance of rain Monday Night Monday Night... Rain likely. Mostly cloudy, with a low around 49.
70% chance of rain Tuesday Tuesday... Rain likely. Cloudy, with a high near 57.
Rain on Tuesday Night Tuesday Night... Rain. Mostly cloudy, with a low around 49.
70% chance of rain Wednesday Wednesday... Rain likely. Mostly cloudy, with a high near 57.
Current Radar Image


Sun Almanac for South San Francisco, California
Sunrise: 07:20 AM
Sunset: 4:53 PM
Civil Sunrise:06:50 AM
Civil Sunset: 5:23 PM
Nautical Sunrise: 06:17 AM
Nautical Sunset: 5:56 PM
Astro Sunrise: 05:46 AM
Astro Sunset: 6:27 PM
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