Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

Partly Cloudy

48°F

9°C

Humidity 87%
Wind Speed N 4 MPH
Barometer 30.3 in (1026.08 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 08 Dec 09:35 PM PST
Extended Forecast for

Hillsborough CA

  • Tonight

    Tonight: Patchy fog after 2am.  Otherwise, partly cloudy, with a low around 45. Light northwest wind.

    Low: 45 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 10am.  Otherwise, sunny, with a high near 62. Calm wind becoming north around 6 mph in the morning.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Light north northeast wind.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 66. North wind around 6 mph.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. Light north northeast wind.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Friday Night

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

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 45. Light northwest wind.
Tuesday
Patchy fog before 10am. Otherwise, sunny, with a high near 62. Calm wind becoming north around 6 mph in the morning.
Tuesday Night
Mostly clear, with a low around 47. Light north northeast wind.
Wednesday
Sunny, with a high near 66. North wind around 6 mph.
Wednesday Night
Mostly clear, with a low around 48. Light north northeast wind.
Thursday
Sunny, with a high near 67.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 67.
Friday Night
Mostly clear, with a low around 46.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 65.
Saturday Night
Patchy fog. Otherwise, partly cloudy, with a low around 48.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 64.
Sunday Night
A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 49.
Monday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
Hillsborough CA
 37.55°N 122.35°W (Elev. 197 ft)
12:26 pm PST Dec 8, 2025
9pm PST Dec 8, 2025-6pm PST Dec 15, 2025
 
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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