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

Fontana-Arrow Highway (CQ057)

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

NA

64°F

18°C

Humidity 84%
Wind Speed WSW 2 MPH
Barometer NA
Dewpoint 59°F (15°C)
Visibility NA
Last update 13 Nov 12:00 AM PST
Extended Forecast for

3 Miles S Rialto CA

  • Overnight

    Overnight: Showers, mainly after 4am. Low around 58. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 58 °F

    Showers

  • Friday

    Friday: Showers, mainly before 10am. High near 69. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 69 °F

    Showers

  • Friday Night

    Friday Night: Showers, mainly before 4am. Low around 55. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Showers

  • Saturday

    Saturday: A slight chance of showers before 10am. Mostly sunny, with a high near 67. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 52. Calm wind becoming north around 5 mph.

    Low: 52 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers after 10am. Partly sunny, with a high near 66.

    High: 66 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Showers, mainly before 4am. Cloudy, with a low around 51.

    Low: 51 °F

    Showers

Detailed Forecast

Overnight
Showers, mainly after 4am. Low around 58. Calm wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Showers, mainly before 10am. High near 69. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers, mainly before 4am. Low around 55. Southwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
A slight chance of showers before 10am. Mostly sunny, with a high near 67. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 52. Calm wind becoming north around 5 mph.
Sunday
Sunny, with a high near 72.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
A chance of showers after 10am. Partly sunny, with a high near 66.
Monday Night
Showers, mainly before 4am. Cloudy, with a low around 51.
Tuesday
A chance of showers, mainly before 10am. Mostly cloudy, then gradually becoming sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 64.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 48.
Thursday
A chance of showers. Partly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Rialto CA
 34.08°N 117.4°W (Elev. 1125 ft)
Last Update:
11:38 pm PST Nov 12, 2026
Forecast Valid:
1am PST Nov 13, 2026-6pm PST Nov 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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