National Weather Service

News Headlines

Hazardous Weather Conditions

Current conditions at

Fontana-Arrow Highway (CQ057)

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

80°F

27°C

Humidity	45%
Wind Speed	WSW 4 MPH
Barometer	NA
Dewpoint	57°F (14°C)
Visibility	NA
Heat Index	80°F (27°C)
Last update	05 Aug 09:00 PM PDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles E Rancho Cucamonga CA

Heat Advisory August 6, 10:00am until August 8, 08:00pm

Click here for hazard details and duration

Heat Advisory

Tonight
Low: 67 °F
Haze
Wednesday
High: 98 °F
Haze
Wednesday Night
Low: 69 °F
Haze
Thursday
High: 100 °F
Sunny
Thursday Night
Low: 70 °F
Mostly Clear
Friday
High: 98 °F
Sunny
Friday Night
Low: 67 °F
Clear
Saturday
High: 96 °F
Sunny
Saturday Night
Low: 66 °F
Mostly Clear

Detailed Forecast

Tonight

Widespread haze. Mostly clear, with a low around 67. Southwest wind around 5 mph becoming calm in the evening.

Wednesday

Widespread haze. 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.

Wednesday Night

Widespread haze. Mostly clear, with a low around 69. West wind 10 to 15 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

Thursday

Sunny, with a high near 100. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

Thursday Night

Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light and variable in the evening.

Friday

Sunny, with a high near 98.

Friday Night

Clear, with a low around 67.

Saturday

Sunny, with a high near 96.

Saturday Night

Mostly clear, with a low around 66.