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

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

San Jose / Reid / Hillv (KRHV)

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

Partly Cloudy

64°F

18°C

Humidity 55%
Wind Speed SE 5 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 10 Apr 06:47 PM PDT
Extended Forecast for

Mount Hamilton CA

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm before 11pm, then a chance of rain, mainly between 11pm and 5am. Mostly cloudy, with a steady temperature around 50. South southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Showers
    Likely

  • Saturday

    Saturday: Rain likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then a chance of rain after 2pm. Mostly cloudy, with a high near 50. South wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 50 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 5am, then rain after 5am. Low around 41. South southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 41 °F

    Showers

  • Sunday

    Sunday: Rain before 8am, then showers and possibly a thunderstorm after 8am. High near 46. South southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 46 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain

  • Monday

    Monday: A 20 percent chance of rain after 11am. Mostly sunny, with a high near 53.

    High: 53 °F

    Slight Chance
    Rain

  • Monday Night

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

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Tuesday Night

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

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm before 11pm, then a chance of rain, mainly between 11pm and 5am. Mostly cloudy, with a steady temperature around 50. South southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then a chance of rain after 2pm. Mostly cloudy, with a high near 50. South wind 10 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm before 5am, then rain after 5am. Low around 41. South southwest wind 14 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Sunday
Rain before 8am, then showers and possibly a thunderstorm after 8am. High near 46. South southwest wind 13 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41. Southwest wind 5 to 10 mph, with gusts as high as 21 mph. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 20 percent chance of rain after 11am. Mostly sunny, with a high near 53.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 57.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 58.
Thursday Night
Mostly clear, with a low around 44.
Friday
Sunny, with a high near 64.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
Last Update:
2:57 pm PDT Apr 10, 2026
Forecast Valid:
8pm PDT Apr 10, 2026-6pm PDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

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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