National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Lake Effect Snow through Friday; Heavy Rain, Thunderstorms and Mountain Snow in California

Periods of moderate to heavy lake effect snow will continue through Friday downwind of Lake Erie and Ontario. Several additional inches of accumulating snow are expected. A Pacific storm will bring heavy rain and mountain snow across California, the Southwest and Intermountain West today. Isolated severe thunderstorms and scattered flash flooding is possible across parts of southern California. Read More >

Current conditions at

San Jose / Reid / Hillv (KRHV)

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

Partly Cloudy

63°F

17°C

Humidity 77%
Wind Speed S 9 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 01 Jan 12:47 PM PST
Extended Forecast for

Mount Hamilton CA

  • New Year's Day

    New Year's Day: A chance of showers and thunderstorms, mainly before 3pm, then a slight chance of rain and thunderstorms after 4pm. Mostly cloudy, with a steady temperature around 49. South southwest wind around 16 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 49 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Mostly cloudy, with a steady temperature around 47. South southeast wind 10 to 13 mph, with gusts as high as 21 mph.

    Low: 47 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Friday

    Friday: Rain likely after 4pm. Mostly cloudy, with a high near 51. South wind 15 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Partly Sunny
    then Rain
    Likely

  • Friday Night

    Friday Night: Rain. Low around 47. Breezy, with a south southeast wind around 24 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 47 °F

    Rain and
    Breezy

  • Saturday

    Saturday: Rain. High near 51. Breezy, with a south southwest wind 22 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 51 °F

    Rain and
    Breezy

  • Saturday Night

    Saturday Night: Rain. Low around 47. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Rain

  • Sunday

    Sunday: Rain. High near 50. Breezy. Chance of precipitation is 100%.

    High: 50 °F

    Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Rain

  • Monday

    Monday: Rain likely. Mostly cloudy, with a high near 48.

    High: 48 °F

    Rain Likely

Detailed Forecast

New Year's Day
A chance of showers and thunderstorms, mainly before 3pm, then a slight chance of rain and thunderstorms after 4pm. Mostly cloudy, with a steady temperature around 49. South southwest wind around 16 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 20 percent chance of rain before 10pm. Mostly cloudy, with a steady temperature around 47. South southeast wind 10 to 13 mph, with gusts as high as 21 mph.
Friday
Rain likely after 4pm. Mostly cloudy, with a high near 51. South wind 15 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 47. Breezy, with a south southeast wind around 24 mph, with gusts as high as 41 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday
Rain. High near 51. Breezy, with a south southwest wind 22 to 25 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain. Low around 47. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain. High near 50. Breezy. Chance of precipitation is 100%.
Sunday Night
Rain. Mostly cloudy, with a low around 44.
Monday
Rain likely. Mostly cloudy, with a high near 48.
Monday Night
Rain likely, mainly before 10pm. Mostly cloudy, with a low around 41.
Tuesday
A slight chance of rain. Mostly sunny, with a high near 49.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A chance of rain. Partly sunny, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
Last Update:
12:32 pm PST Jan 1, 2026
Forecast Valid:
1pm PST Jan 1, 2026-6pm PST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation