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

Hazardous Weather Conditions

Current conditions at

EW9979 MasonValley (E9979)

Lat: 32.99317°NLon: 116.44467°WElev: 2115.91ft.

NA

91°F

33°C

Humidity 27%
Wind Speed N 9 MPH
Barometer 29.66 in (1004.4 mb)
Dewpoint 53°F (12°C)
Visibility NA
Heat Index88°F (31°C)
Last update 08 Aug 11:00 PM PDT
Extended Forecast for

10 Miles ESE Julian CA

Heat Advisory August 8, 11:27pm until August 9, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 8, 11:27pm until August 9, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • Tonight

    Low: 80 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers after 11am. Mostly sunny, with a high near 103. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 103 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 79. West wind around 5 mph becoming calm in the evening.

    Low: 79 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 100. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.

    High: 100 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers after 11pm. Partly cloudy, with a low around 77. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 96. Chance of precipitation is 50%.

    High: 96 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 80. West wind around 5 mph becoming calm.
Sunday
A slight chance of showers after 11am. Mostly sunny, with a high near 103. Calm wind becoming southeast around 5 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 79. West wind around 5 mph becoming calm in the evening.
Monday
A slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 100. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 20%.
Monday Night
A slight chance of showers after 11pm. Partly cloudy, with a low around 77. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Tuesday
A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 96. Chance of precipitation is 50%.
Tuesday Night
Partly cloudy, with a low around 73.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Mostly clear, with a low around 71.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 70.
Friday
Mostly sunny, with a high near 93.
Friday Night
Partly cloudy, with a low around 71.
Saturday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
10 Miles ESE Julian CA
 33.05°N 116.42°W (Elev. 2651 ft)
Last Update:
12:01 pm PDT Aug 8, 2026
Forecast Valid:
11pm PDT Aug 8, 2026-6pm PDT Aug 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation