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

Hazardous Weather Conditions

Current conditions at

Fontana-Arrow Highway (CQ057)

Lat: 34.10056°NLon: 117.49222°WElev: 1191.0ft.

NA

83°F

28°C

Humidity 33%
Wind Speed SW 1 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index82°F (28°C)
Last update 22 Aug 11:00 PM PDT
Extended Forecast for

3 Miles N Fontana CA

Extreme Heat Watch August 25, 10:00am until August 28, 08:00pm
Heat Advisory August 23, 12:22am until August 25, 10:00am
Click here for hazard details and duration
Extreme Heat Watch
Heat Advisory
  •  
    Heat Advisory August 23, 12:22am until August 25, 10:00am

    NOW until 10:00am Tue

    Heat Advisory

  • Overnight

    Low: 72 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 102. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 102 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 101. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 101 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light west in the evening.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 102.

    High: 102 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 102.

    High: 102 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 72. Calm wind.
Sunday
Sunny, with a high near 102. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 101. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 71. Southwest wind 5 to 10 mph becoming light west in the evening.
Tuesday
Sunny, with a high near 102.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny, with a high near 102.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny, with a high near 104.
Thursday Night
Partly cloudy, with a low around 73.
Friday
Mostly sunny, with a high near 104.
Friday Night
Mostly clear, with a low around 73.
Saturday
Sunny, with a high near 103.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles N Fontana CA
 34.14°N 117.46°W (Elev. 1490 ft)
Last Update:
11:34 pm PDT Aug 22, 2026
Forecast Valid:
12am PDT Aug 23, 2026-6pm PDT Aug 29, 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