National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

LAKE MATHEWS (MHEC1)

Lat: 33.81694°NLon: 117.46361°WElev: 1516.0ft.

NA

91°F

33°C

Humidity 34%
Wind Speed N 11 MPH
Barometer NA
Dewpoint 59°F (15°C)
Visibility NA
Heat Index90°F (32°C)
Last update 21 Aug 06:16 PM PDT
Extended Forecast for

5 Miles S Riverside Municipal CA

Heat Advisory August 22, 10:00am until August 24, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

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

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 98. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 98 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 70. Northwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 70 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 99. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 99 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 70. West wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 99.

    High: 99 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 70.

    Low: 70 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 99.

    High: 99 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 70. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Saturday
Sunny, with a high near 98. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Clear, with a low around 70. Northwest wind 5 to 10 mph becoming light and variable in the evening.
Sunday
Sunny, with a high near 99. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Clear, with a low around 70. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 99.
Monday Night
Clear, with a low around 70.
Tuesday
Sunny, with a high near 99.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Sunny, with a high near 98.
Thursday Night
Mostly clear, with a low around 70.
Friday
Mostly sunny, with a high near 98.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Riverside Municipal CA
 33.87°N 117.46°W (Elev. 1581 ft)
Last Update:
12:32 pm PDT Aug 21, 2026
Forecast Valid:
7pm PDT Aug 21, 2026-6pm PDT Aug 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation