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Hazardous Weather Conditions

Extreme Heat Warning until September 10, 08:00 PM PDT

Current conditions at

Fontana-Arrow Highway (CQ057)

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

81°F

27°C

Humidity	56%
Wind Speed	WSW 0 MPH
Barometer	NA
Dewpoint	65°F (18°C)
Visibility	NA
Heat Index	83°F (28°C)
Last update	10 Sep 08:00 AM PDT

More Information:

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

Extended Forecast for

Rancho Cucamonga CA

Extreme Heat Warning September 10, 09:55am until September 10, 08:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning September 10, 09:55am until September 10, 08:00pm
NOW until 8:00pm Thu
Extreme Heat Warning
Today
High: 103 °F
Sunny
Tonight
Low: 72 °F
Mostly Clear
Friday
High: 94 °F
Sunny
Friday Night
Low: 68 °F
Mostly Clear
Saturday
High: 87 °F
Sunny
Saturday Night
Low: 64 °F
Clear
Sunday
High: 84 °F
Sunny
Sunday Night
Low: 63 °F
Clear

Detailed Forecast

Today

Sunny, with a high near 103. Heat index values as high as 108. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

Tonight

Mostly clear, with a low around 72. Southwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

Friday

Sunny, with a high near 94. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

Friday Night

Mostly clear, with a low around 68. Southwest wind 5 to 10 mph.

Saturday

Sunny, with a high near 87. Light south wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

Saturday Night

Clear, with a low around 64.

Sunday

Sunny, with a high near 84.