Heavy Rainfall and Severe Thunderstorm Threats; Record High Temperatures into the Weekend

Scattered showers and thunderstorms with the potential for isolated flash flooding and severe weather continue from the Intermountain West through the Plains into the weekend. This threat also extends into Florida as we are monitoring a disturbance in the Gulf of Mexico. Also, new record high temperatures are forecast for the Upper Midwest, Great Lakes and Northeast into the weekend. Read More >

En Español

Current conditions at

Fontana-Arrow Highway (CQ057)

Lat: 34.10056°NLon: 117.49222°WElev: 1191ft.

62°F

17°C

Humidity	82%
Wind Speed	WSW 5 MPH
Barometer	NA
Dewpoint	56°F (13°C)
Visibility	NA
Last update	31 May 06:00 PM PDT

More Information:

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

Extended Forecast for

Fontana CA

Tonight

Mostly Cloudy
Low: 54 °F
Thursday

Decreasing
Clouds
High: 70 °F
Thursday
Night

Patchy Fog
Low: 55 °F
Friday

Patchy Fog
then Sunny
High: 75 °F
Friday
Night

Patchy Fog
Low: 55 °F
Saturday

Patchy Fog
then Sunny
High: 81 °F
Saturday
Night

Patchy Fog
Low: 58 °F
Sunday

Patchy Fog
then Sunny
High: 81 °F
Sunday
Night

Patchy Fog
Low: 57 °F

Detailed Forecast

Tonight

Mostly cloudy, with a low around 54. West wind 5 to 15 mph, with gusts as high as 20 mph.

Thursday

Mostly cloudy, then gradually becoming sunny, with a high near 70. Light west wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

Thursday Night

Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 55. West wind 5 to 15 mph, with gusts as high as 25 mph.

Friday

Patchy fog before 11am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 75. Southwest wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

Friday Night

Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 55. Southwest wind 10 to 15 mph becoming light west after midnight. Winds could gust as high as 25 mph.

Saturday

Patchy fog before 11am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 81.

Saturday Night

Patchy fog after 11pm. Otherwise, mostly clear, with a low around 58.

Sunday

Patchy fog before 11am. Otherwise, mostly sunny, with a high near 81.

Sunday Night

Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 57.

Monday

Patchy fog before 11am. Otherwise, mostly sunny, with a high near 74.

Monday Night

A slight chance of showers and thunderstorms. Patchy fog. Otherwise, increasing clouds, with a low around 55.