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.

Mostly Cloudy

70°F

21°C

Humidity 46%
Wind Speed SSW 13 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 10 Apr 02:47 PM PDT
Extended Forecast for

4 Miles SW Mount Hamilton CA

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a steady temperature around 59. South southwest wind around 9 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 59 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 11pm, then a chance of rain, mainly between 11pm and 5am. Mostly cloudy, with a low around 47. South wind 3 to 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers
    Likely

  • Saturday

    Saturday: Rain and thunderstorms likely. Mostly cloudy, with a high near 58. South wind 6 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 58 °F

    Rain Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 42. South southwest wind 7 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 42 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 54. South southwest wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 54 °F

    Showers

  • Sunday Night

    Sunday Night: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41. 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. Mostly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Rain

  • Monday Night

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

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms, mainly after 5pm. Partly sunny, with a steady temperature around 59. South southwest wind around 9 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely before 11pm, then a chance of rain, mainly between 11pm and 5am. Mostly cloudy, with a low around 47. South wind 3 to 7 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 and thunderstorms likely. Mostly cloudy, with a high near 58. South wind 6 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm. Low around 42. South southwest wind 7 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Sunday
Showers and possibly a thunderstorm. High near 54. South southwest wind 7 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41. New precipitation amounts of less than a tenth of an inch possible.
Monday
A 20 percent chance of rain. Mostly sunny, with a high near 60.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 64.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
Sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Mount Hamilton CA
 37.3°N 121.69°W (Elev. 1401 ft)
Last Update:
2:57 pm PDT Apr 10, 2026
Forecast Valid:
3pm 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