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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Hazardous Weather Conditions

Current conditions at

KNOXVILLE CREEK (KNXC1)

Lat: 38.86194°NLon: 122.41722°WElev: 2200.0ft.

NA

93°F

34°C

Humidity 13%
Wind Speed NE 5 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Heat Index89°F (32°C)
Last update 04 Oct 12:09 PM PDT
Extended Forecast for

Hidden Valley Lake CA

Heat Advisory October 4, 12:25pm until October 4, 11:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory October 4, 12:25pm until October 4, 11:00pm

    NOW until 11:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 98 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 63. Calm wind becoming north northwest around 5 mph.

    Low: 63 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny and hot, with a high near 100. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 63. West southwest wind 5 to 7 mph becoming calm.

    Low: 63 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 100. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 100 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 61. West southwest wind 5 to 9 mph becoming calm in the evening.

    Low: 61 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 98. Calm wind.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 63. Calm wind becoming north northwest around 5 mph.
Monday
Sunny and hot, with a high near 100. Calm wind becoming south southwest around 5 mph in the afternoon.
Monday Night
Clear, with a low around 63. West southwest wind 5 to 7 mph becoming calm.
Tuesday
Sunny and hot, with a high near 100. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tuesday Night
Clear, with a low around 61. West southwest wind 5 to 9 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Clear, with a low around 61.
Thursday
Sunny, with a high near 98.
Thursday Night
Clear, with a low around 61.
Friday
Sunny, with a high near 93.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hidden Valley Lake CA
 38.8°N 122.51°W (Elev. 1240 ft)
Last Update:
10:05 am PDT Oct 4, 2026
Forecast Valid:
12pm PDT Oct 4, 2026-6pm PDT Oct 10, 2026
 
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