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

Heat Builds in the West; Extremely Critical Fire Weather in the Northwest

A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Critical to extremely critical fire weather conditions are forecast from the Northwest and the northern Great Basin this weekend. Particularly Dangerous Situation Red Flag Warnings have been issued. Read More >

Hazardous Weather Conditions

Current conditions at

KNOXVILLE CREEK (KNXC1)

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

NA

75°F

24°C

Humidity 38%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 48°F (9°C)
Visibility NA
Last update 02 Aug 03:09 AM PDT
Extended Forecast for

Hidden Valley Lake CA

Heat Advisory August 3, 11:00am until August 4, 11:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Clear, with a low around 64. Northwest wind around 6 mph.

    Low: 64 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 102. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 102 °F

    Hot

  • Sunday Night

    Sunday Night: Clear, with a low around 65. West southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 65 °F

    Clear

  • Monday

    Monday: Sunny and hot, with a high near 103. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 103 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 65. Southwest wind 5 to 8 mph becoming calm in the evening.

    Low: 65 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 101. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 101 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 58.

    Low: 58 °F

    Clear

Detailed Forecast

Overnight
Clear, with a low around 64. Northwest wind around 6 mph.
Sunday
Sunny and hot, with a high near 102. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Sunday Night
Clear, with a low around 65. West southwest wind 5 to 10 mph becoming light and variable after midnight.
Monday
Sunny and hot, with a high near 103. Calm wind becoming north northeast 5 to 7 mph in the morning.
Monday Night
Clear, with a low around 65. Southwest wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny and hot, with a high near 101. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Clear, with a low around 60.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Clear, with a low around 58.
Thursday
Sunny, with a high near 98.
Thursday Night
Clear, with a low around 61.
Friday
Sunny and hot, with a high near 101.
Friday Night
Clear, with a low around 64.
Saturday
Sunny and hot, with a high near 102.
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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:
2:21 am PDT Aug 2, 2026
Forecast Valid:
3am PDT Aug 2, 2026-6pm PDT Aug 8, 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