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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Hailey, Friedman Memorial Airport (KSUN)

Lat: 43.5°NLon: 114.3°WElev: 5318.0ft.

Clear

63°F

17°C

Humidity 51%
Wind Speed NW 5 MPH
Barometer 30.12 in (1019.98 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 27 Aug 11:55 PM MDT
Extended Forecast for

Sun Valley ID

  • Overnight

    Overnight: Mostly cloudy, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Cloudy

  • Friday

    Friday: A 50 percent chance of showers, mainly after noon. Cloudy, with a high near 71. Light and variable wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 71 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely. Mostly cloudy, with a low around 43. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 70. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%.

    High: 70 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 39. Southwest wind 5 to 10 mph becoming light south southwest after midnight. Chance of precipitation is 70%.

    Low: 39 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Sunny, with a high near 69.

    High: 69 °F

    Slight Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    then Partly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 50. Light and variable wind.
Friday
A 50 percent chance of showers, mainly after noon. Cloudy, with a high near 71. Light and variable wind becoming west southwest 5 to 8 mph in the afternoon.
Friday Night
Showers likely. Mostly cloudy, with a low around 43. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%.
Saturday
Showers likely, with thunderstorms also possible after noon. Mostly cloudy, with a high near 70. Light and variable wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%.
Saturday Night
A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 39. Southwest wind 5 to 10 mph becoming light south southwest after midnight. Chance of precipitation is 70%.
Sunday
A 20 percent chance of showers before noon. Sunny, with a high near 69.
Sunday Night
Mostly clear, with a low around 36.
Monday
Sunny, with a high near 72.
Monday Night
A 30 percent chance of rain before midnight. Partly cloudy, with a low around 41.
Tuesday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 72.
Tuesday Night
A 20 percent chance of rain. Partly cloudy, with a low around 39.
Wednesday
Mostly sunny, with a high near 69.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sun Valley ID
 43.69°N 114.33°W (Elev. 6385 ft)
Last Update:
11:31 pm MDT Aug 27, 2026
Forecast Valid:
12am MDT Aug 28, 2026-6pm MDT Sep 3, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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