Hazardous Weather Conditions
Current conditions at
Fontana-Arrow Highway (CQ057)
Lat: 34.10056°NLon: 117.49222°WElev: 1191.0ft.NA
100°F
38°C
| Humidity | 16% |
| Wind Speed | SE 3 MPH |
| Barometer | NA |
| Dewpoint | 47°F (8°C) |
| Visibility | NA |
| Heat Index | 96°F (36°C) |
| Last update | 04 Oct 02:00 PM PDT |
Extended Forecast for
Rancho Cucamonga CA
Extreme Heat Warning October 4, 03:30pm until October 8, 08:00pm
NOW until 8:00pm Thu
Extreme Heat Warning
Tonight
Low: 74 °F
Clear
Monday
High: 98 °F
Sunny
Monday Night
Low: 72 °F
Mostly Clear
Tuesday
High: 98 °F
Sunny
Tuesday Night
Low: 73 °F
Clear
Wednesday
High: 99 °F
Sunny
Wednesday Night
Low: 72 °F
Clear
Thursday
High: 98 °F
Sunny
Detailed Forecast
Tonight
Clear, with a low around 74. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 98. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 72. Calm wind becoming northeast around 5 mph.
Tuesday
Sunny, with a high near 98. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 73. West wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 99.
Wednesday Night
Clear, with a low around 72.
Thursday
Sunny, with a high near 98.
Thursday Night
Clear, with a low around 71.
Friday
Sunny, with a high near 94.
Friday Night
Mostly clear, with a low around 67.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 80.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Rancho Cucamonga CA
34.13°N 117.57°W (Elev. 1362 ft)
34.13°N 117.57°W (Elev. 1362 ft)
12:40 pm PDT Oct 4, 2026
3pm PDT Oct 4, 2026-6pm PDT Oct 11, 2026
Additional Resources
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