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

50°F

10°C

Humidity 80%
Wind Speed NA NA MPH
Barometer NA
Dewpoint 44°F (7°C)
Visibility NA
Last update 21 Jan 04:43 AM PST
Extended Forecast for

3 Miles SW San Francisco CA

  • Today

    Today: Cloudy, with a high near 59. Northeast wind around 5 mph becoming west in the afternoon.

    High: 59 °F

    Cloudy

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm.  Mostly cloudy, with a low around 48. Light and variable wind.

    Low: 48 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 10am.  Otherwise, partly sunny, with a high near 58. Calm wind becoming west around 6 mph in the afternoon.

    High: 58 °F

    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight.  Otherwise, mostly cloudy, with a low around 48. West southwest wind around 6 mph.

    Low: 48 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 58. Light and variable wind becoming north around 6 mph in the morning.

    High: 58 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

Detailed Forecast

Today
Cloudy, with a high near 59. Northeast wind around 5 mph becoming west in the afternoon.
Tonight
A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 48. Light and variable wind.
Thursday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 58. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Patchy fog after midnight. Otherwise, mostly cloudy, with a low around 48. West southwest wind around 6 mph.
Friday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 58. Light and variable wind becoming north around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Sunny, with a high near 60.
Saturday Night
Partly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 59.
Sunday Night
Mostly cloudy, with a low around 45.
Monday
Partly sunny, with a high near 60.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Partly sunny, with a high near 60.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW San Francisco CA
 37.74°N 122.46°W (Elev. 610 ft)
2:13 am PST Jan 21, 2026
5am PST Jan 21, 2026-6pm PST Jan 27, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database