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

52°F

11°C

Humidity 76%
Wind Speed N 0 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 21 Jan 09:47 AM PST
Extended Forecast for

Mount Hamilton CA

  • Today

    Today: A 10 percent chance of rain after 4pm.  Mostly cloudy, with a temperature falling to around 53 by 5pm. Calm wind.

    High: 59 °F

    Cloudy then
    Slight Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm.  Mostly cloudy, with a low around 44. Calm wind.

    Low: 44 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 56. Light northwest wind.

    High: 56 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 40. Light west northwest wind.

    Low: 40 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 55. Light and variable wind.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

Detailed Forecast

Today
A 10 percent chance of rain after 4pm. Mostly cloudy, with a temperature falling to around 53 by 5pm. Calm wind.
Tonight
A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 44. Calm wind.
Thursday
Partly sunny, with a high near 56. Light northwest wind.
Thursday Night
Partly cloudy, with a low around 40. Light west northwest wind.
Friday
Sunny, with a high near 55. Light and variable wind.
Friday Night
Mostly clear, with a low around 39.
Saturday
Sunny, with a high near 55.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Mostly cloudy, with a low around 41.
Monday
Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Partly sunny, with a high near 58.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
2:13 am PST Jan 21, 2026
10am 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