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 Jose / Reid / Hillv (KRHV)

Lat: 37.33333°NLon: 121.81667°WElev: 135.0ft.

Mostly Cloudy

54°F

12°C

Humidity 71%
Wind Speed N 0 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 21 Jan 10:55 AM PST
Extended Forecast for

5 Miles SSW Mount Hamilton CA

  • Today

    Today: A 10 percent chance of rain after 4pm.  Cloudy, with a high near 65. Light south wind.

    High: 65 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm.  Mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 64. Calm wind becoming west northwest around 5 mph in the afternoon.

    High: 64 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Patchy fog before 3am, then patchy fog after 5am.  Otherwise, partly cloudy, with a low around 42. Calm wind.

    Low: 42 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 62. Calm wind becoming west around 5 mph in the afternoon.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 41.

    Low: 41 °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 39.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

Detailed Forecast

Today
A 10 percent chance of rain after 4pm. Cloudy, with a high near 65. Light south wind.
Tonight
A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 45. Calm wind.
Thursday
Partly sunny, with a high near 64. Calm wind becoming west northwest around 5 mph in the afternoon.
Thursday Night
Patchy fog before 3am, then patchy fog after 5am. Otherwise, partly cloudy, with a low around 42. Calm wind.
Friday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming west around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 41.
Saturday
Sunny, with a high near 62.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Partly sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 65.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Mount Hamilton CA
 37.28°N 121.68°W (Elev. 1138 ft)
2:13 am PST Jan 21, 2026
11am 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