Hazardous Weather Conditions
Current conditions at
Ontario International Airport (KONT)
Lat: 34.05316°NLon: 117.57685°WElev: 906.0ft.
Clear
75°F
24°C
| Humidity | 66% |
| Wind Speed | WSW 8 MPH |
| Barometer | 29.9 in (1012.53 mb) |
| Dewpoint | 63°F (17°C) |
| Visibility | 10.00 mi |
| Last update | 24 Jul 11:53 PM PDT |
Extended Forecast for
Rancho Cucamonga CA
Extreme Heat Warning July 25, 12:03am until July 27, 08:00pm
NOW until 8:00pm Mon

Extreme Heat Warning
Overnight

Low: 71 °F
Mostly Clear
Saturday

High: 100 °F
Sunny
Saturday Night

Low: 71 °F
Patchy Fog
Sunday

High: 98 °F
Sunny
Sunday Night

Low: 70 °F
Mostly Clear
Monday

High: 98 °F
Sunny
Monday Night

Low: 69 °F
Mostly Clear
Tuesday

High: 97 °F
Sunny
Detailed Forecast
Overnight
Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 100. Light and variable wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Southwest wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 98. Light south wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light west in the evening.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 99.
Thursday Night
Mostly clear, with a low around 70.
Friday
Sunny, with a high near 99.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Rancho Cucamonga CA
34.1°N 117.57°W (Elev. 1198 ft)
34.1°N 117.57°W (Elev. 1198 ft)
2:02 pm PDT Jul 24, 2026
12am PDT Jul 25, 2026-6pm PDT Jul 31, 2026



