National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

SAN FRANCISCO DOWNTOWN (SFOC1)

Lat: 37.77056°NLon: 122.42694°WElev: 150.0ft.

NA

57°F

14°C

Humidity 58%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 42°F (6°C)
Visibility NA
Last update 21 Jan 02:43 PM PST
Extended Forecast for

San Francisco CA

  • This Afternoon

    This Afternoon: Isolated sprinkles between 4pm and 5pm. Cloudy, with a high near 59. Light north northwest wind.

    High: 59 °F

    Isolated
    Sprinkles

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 60. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 60 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight. Otherwise, increasing clouds, with a low around 48. West southwest wind 3 to 6 mph.

    Low: 48 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 11am. Otherwise, partly sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Isolated sprinkles between 4pm and 5pm. Cloudy, with a high near 59. Light north northwest wind.
Tonight
Mostly cloudy, with a low around 49. Calm wind.
Thursday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 60. Calm wind becoming west 5 to 7 mph in the afternoon.
Thursday Night
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 48. West southwest wind 3 to 6 mph.
Friday
Patchy fog before 11am. Otherwise, partly sunny, with a high near 59. Light and variable wind.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 62.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 61.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 48.
Wednesday
A chance of rain. Mostly cloudy, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Francisco CA
 37.77°N 122.41°W (Elev. 131 ft)
Last Update:
2:22 pm PST Jan 21, 2026
Forecast Valid:
3pm PST Jan 21, 2026-6pm PST Jan 28, 2026
 
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