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

80°F

27°C

Humidity 36%
Wind Speed WSW 4 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index80°F (27°C)
Last update 07 Jul 09:00 PM PDT
Extended Forecast for

3 Miles S Rialto CA

Heat Advisory July 8, 10:00am until July 9, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Mostly clear, with a low around 65. West wind around 5 mph becoming calm.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 100. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 100 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 67 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 101. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 101 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. Southwest wind 5 to 10 mph becoming light south after midnight.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 95.

    High: 95 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 65. West wind around 5 mph becoming calm.
Wednesday
Sunny, with a high near 100. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 67. West wind 5 to 10 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 101. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 65. Southwest wind 5 to 10 mph becoming light south after midnight.
Friday
Sunny, with a high near 97.
Friday Night
Mostly clear, with a low around 65.
Saturday
Mostly sunny, with a high near 95.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Mostly cloudy, with a high near 94.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 67.
Monday
A slight chance of showers. Mostly sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Mostly sunny, with a high near 99.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Rialto CA
 34.08°N 117.4°W (Elev. 1125 ft)
Last Update:
8:54 pm PDT Jul 7, 2026
Forecast Valid:
11pm PDT Jul 7, 2026-6pm PDT Jul 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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