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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

San Jose / Reid / Hillv (KRHV)

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

Clear

59°F

15°C

Humidity 77%
Wind Speed N 0 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 21 Mar 07:47 AM PDT
Extended Forecast for

10 Miles NNE Mount Hamilton CA

  • Today

    Today: Mostly sunny, with a high near 74. Northwest wind 7 to 13 mph, with gusts as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. West northwest wind 11 to 14 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 72. North northwest wind 9 to 11 mph.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45. West southwest wind around 10 mph.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72. West northwest wind 7 to 10 mph.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 74. Northwest wind 7 to 13 mph, with gusts as high as 20 mph.
Tonight
Mostly clear, with a low around 45. West northwest wind 11 to 14 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 72. North northwest wind 9 to 11 mph.
Sunday Night
Mostly clear, with a low around 45. West southwest wind around 10 mph.
Monday
Sunny, with a high near 72. West northwest wind 7 to 10 mph.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNE Mount Hamilton CA
 37.48°N 121.56°W (Elev. 3707 ft)
Last Update:
2:22 am PDT Mar 21, 2026
Forecast Valid:
8am PDT Mar 21, 2026-6pm PDT Mar 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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