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.

Partly Cloudy

63°F

17°C

Humidity 72%
Wind Speed WNW 4 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 21 Mar 08:47 AM PDT
Extended Forecast for

5 Miles SSW Mount Hamilton CA

  • Today

    Today: Mostly sunny, with a high near 81. Calm wind becoming northwest 5 to 9 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50. West northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79. Calm wind becoming west northwest 5 to 7 mph in the afternoon.

    High: 79 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 52.

    Low: 52 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 81. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Tonight
Mostly clear, with a low around 50. Northwest wind 5 to 8 mph becoming calm after midnight.
Sunday
Sunny, with a high near 80. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 50. West northwest wind 5 to 8 mph becoming calm in the evening.
Monday
Sunny, with a high near 79. Calm wind becoming west northwest 5 to 7 mph in the afternoon.
Monday Night
Clear, with a low around 52.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
Mostly sunny, with a high near 78.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 49.
Friday
Mostly sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Mount Hamilton CA
 37.28°N 121.68°W (Elev. 1138 ft)
Last Update:
2:22 am PDT Mar 21, 2026
Forecast Valid:
9am PDT Mar 21, 2026-6pm PDT Mar 27, 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