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

Monsoons Return to the Southwest U.S.; Potential Atlantic Tropical System Interaction

In Arizona and New Mexico, heavy to excessive rainfall from monsoon thunderstorms may bring isolated flash and urban flooding Thursday into Sunday. The close proximity of Tropical Storm Humberto and a tropical wave (AL94) could lead to interaction between them, and details of their long-range track and intensity forecasts, and any potential impacts, are more uncertain than usual. Read More >

Current conditions at

San Jose / Reid / Hillv (KRHV)

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

Mostly Cloudy

75°F

24°C

Humidity 50%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 24 Sep 09:47 PM PDT
Extended Forecast for

Mount Hamilton CA

  • Overnight

    Overnight: A 30 percent chance of showers. Mostly cloudy, with a steady temperature around 66. Calm wind.

    Low: 66 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 73. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 60. West wind 5 to 7 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Friday

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

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 64. West wind around 6 mph becoming calm in the evening.

    Low: 64 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers. Mostly cloudy, with a steady temperature around 66. Calm wind.
Thursday
Mostly sunny, with a high near 73. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly clear, with a low around 60. West wind 5 to 7 mph becoming calm in the evening.
Friday
Sunny, with a high near 79. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
Clear, with a low around 64. West wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 74.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 59.
Monday
A slight chance of rain. Mostly sunny, with a high near 68.
Monday Night
A chance of rain. Partly cloudy, with a low around 57.
Tuesday
A chance of rain. Mostly sunny, with a high near 66.
Tuesday Night
A chance of rain. Partly cloudy, with a low around 56.
Wednesday
Sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Hamilton CA
 37.35°N 121.64°W (Elev. 2398 ft)
Last Update:
3:20 pm PDT Sep 24, 2025
Forecast Valid:
3am PDT Sep 25, 2025-6pm PDT Oct 1, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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