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

92°F

33°C

Humidity 26%
Wind Speed WSW 3 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Heat Index89°F (32°C)
Last update 22 Aug 11:00 AM PDT
Extended Forecast for

5 Miles SSW Fontana CA

Heat Advisory August 22, 12:32pm until August 23, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 22, 12:32pm until August 23, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 102 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 73. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 73 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 99. Northeast wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.

    High: 99 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. Southwest wind 5 to 10 mph becoming light south after midnight.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 101. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 101 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 72 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 99. Chance of precipitation is 20%.

    High: 99 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 102. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 73. West wind 5 to 10 mph becoming light and variable in the evening.
Saturday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 99. Northeast wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 74. Southwest wind 5 to 10 mph becoming light south after midnight.
Sunday
Mostly sunny, with a high near 101. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 72.
Monday
A slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 99. Chance of precipitation is 20%.
Monday Night
Mostly clear, with a low around 70.
Tuesday
A slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 94.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles SSW Fontana CA
 34.04°N 117.5°W (Elev. 912 ft)
Last Update:
2:12 am PDT Aug 22, 2025
Forecast Valid:
12pm PDT Aug 22, 2025-6pm PDT Aug 28, 2025
 
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