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Critical Fire Weather in the Southern High Plains; Heavy Snow in the Great Lakes and Northeast U.S.

Gusty winds and low relative humidity will bring elevated to critical fire weather conditions to the southern High Plains through the weekend. A winter storm will track across the Great Lakes and Northeast U.S. into Saturday with areas of wintry mix and heavy snow from northern New York through southern Maine. Read More >

Hazardous Weather Conditions

Current conditions at

San Jose / Reid / Hillv (KRHV)

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

Partly Cloudy

46°F

8°C

Humidity 65%
Wind Speed NA 4 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 20 Feb 07:47 PM PST
Extended Forecast for

Mount Hamilton CA

Extreme Cold Warning February 21, 06:19am until February 21, 09:00am
Click here for hazard details and duration
...
  •  
    Extreme Cold Warning February 21, 06:19am until February 21, 09:00am

    NOW until 9:00am Sat

    Extreme Cold Warning

  • Today

    High: 48 °F

    Decreasing
    Clouds

  • Tonight

    Tonight: Mostly clear, with a low around 37. South wind around 10 mph.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 56. South southwest wind 6 to 9 mph.

    High: 56 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 43. Light north northeast wind.

    Low: 43 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 61. Light and variable wind.

    High: 61 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 50. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely. Cloudy, with a high near 55. Chance of precipitation is 60%.

    High: 55 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 4am. Cloudy, with a low around 50.

    Low: 50 °F

    Rain Likely

Detailed Forecast

Today
Mostly cloudy, then gradually becoming sunny, with a high near 48. South wind around 10 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 37. South wind around 10 mph.
Sunday
Mostly sunny, with a high near 56. South southwest wind 6 to 9 mph.
Sunday Night
Partly cloudy, with a low around 43. Light north northeast wind.
Monday
Mostly sunny, with a high near 61. Light and variable wind.
Monday Night
A 30 percent chance of rain after 10pm. Mostly cloudy, with a low around 50. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain likely. Cloudy, with a high near 55. Chance of precipitation is 60%.
Tuesday Night
Rain likely, mainly before 4am. Cloudy, with a low around 50.
Wednesday
A chance of rain, mainly before 10am. Mostly cloudy, with a high near 58.
Wednesday Night
A chance of rain, mainly before 4am. Mostly cloudy, with a low around 46.
Thursday
A slight chance of rain. Mostly sunny, with a high near 62.
Thursday Night
Partly cloudy, with a low around 48.
Friday
Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
Last Update:
12:26 am PST Feb 21, 2026
Forecast Valid:
6am PST Feb 21, 2026-6pm PST Feb 27, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation