Sun Valley, ID Weather

Blaine County9:23 PM MDT43.70°N, 114.35°WElevation 5,945 ft

Current conditions

Light Rain
48°
Light Rain
Feels like 44°
High 51° Friday·Low 36° tonight
WindNNW 9 mph
Humidity100%
Dew point48°
Pressure29.92 inHg
Visibility5.0 mi
Cloud cover92%
UV index0 Low
Sunrise8:01 AM
Sunset6:44 PM

Observed at Hailey, Friedman Memorial Airport · 1 hr ago

Forecast

10-day

  • Tonight

    Showers and thunderstorms before 9pm, then rain between 9pm and 3am, then showers and thunderstorms. Cloudy. Low around 36, with temperatures rising to around 41 overnight. Southeast wind 2 to 6 mph. Chance of precipitation is 100%.

  • Friday

    Showers and thunderstorms before 9am, then rain. Cloudy. High near 51, with temperatures falling to around 48 in the afternoon. South southwest wind around 6 mph. Chance of precipitation is 90%.

  • Friday Night

    A slight chance of rain before 7pm. Partly cloudy. Low around 26, with temperatures rising to around 30 overnight. North wind 5 to 8 mph. Chance of precipitation is 20%.

National Weather Service forecast updated 3 hrs ago.

Hourly

Hourly forecast
  1. Now Rain Likely 49°74%
  2. 10 PM Rain Likely 48°69%
  3. 11 PM Rain Likely 47°60%
  4. Fri12 AM Light Rain 46°76%
  5. 1 AM Light Rain Likely 45°61%
  6. 2 AM Light Rain Likely 44°59%
  7. 3 AM Showers And Thunderstorms Likely 43°72%
  8. 4 AM Showers And Thunderstorms 43°87%
  9. 5 AM Showers And Thunderstorms 41°80%
  10. 6 AM Showers And Thunderstorms 40°88%
  11. 7 AM Showers And Thunderstorms 38°90%
  12. 8 AM Showers And Thunderstorms 37°78%
  13. 9 AM Rain 38°91%
  14. 10 AM Rain 42°94%
  15. 11 AM Rain 42°86%
  16. 12 PM Rain 45°91%
  17. 1 PM Rain 49°94%
  18. 2 PM Light Rain Likely 48°70%
  19. 3 PM Chance Light Rain 48°54%
  20. 4 PM Chance Light Rain 49°44%
  21. 5 PM Chance Light Rain 48°35%
  22. 6 PM Slight Chance Light Rain 46°16%
  23. 7 PM Cloudy 44°
  24. 8 PM Cloudy 41°

10-day forecast

Details
  1. TonightOct 22 Showers And Thunderstorms Showers And Thunderstorms100%36°
  2. FriOct 23 Showers And Thunderstorms then Rain Showers And Thunderstorms then Rain94%26°51°
  3. SatOct 24 Sunny Sunny25°53°
  4. SunOct 25 Sunny Sunny27°56°
  5. MonOct 26 Mostly Sunny Mostly Sunny31%26°57°
  6. TueOct 27 Mostly Sunny Mostly Sunny14%25°52°
  7. WedOct 28 Mostly Sunny Mostly Sunny27°53°
  8. ThuOct 29 Mostly Sunny Mostly Sunny56°
  9. FriOct 30 Mostly sunny Mostly sunny27°49°
  10. SatOct 31 Cloudy Cloudy30°51°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news in Idaho

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Air quality

9
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • ThuGood (15)
  • FriGood (15)
  • SatGood

Ketchum, ID reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 8:01 AM
Sunset 6:44 PM
Daylight 10 h 43 min (−2 min 50 s tomorrow)
Waxing Gibbous · 89% lit
Moonrise 4:54 PM Moonset 4:04 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low53° / 26°
Record high75° (2003)
Record low7° (1943)
Wettest0.45 in (1979)
Yesterday65° / 32°, 0.05 in
Month to date0.06 in (normal 0.90 in)

Ketchum Ranger Station, records since 1937. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in PIH, issued 3 hrs ago

Key Messages

- Flash Flood Watch for Local Burn Scars: A Flash Flood Watch is in effect for the Wapiti, Ohio, and Big Rock burn scars from late tonight through Friday, where incoming precipitation could trigger debris flows and rapid runoff.

- Widespread showers and storms this evening through most of the day Friday.

- Much colder Friday. Daytime temperatures will drop by around 20 degrees.

Discussion

Issued at 139 PM MDT Thu Oct 22 2026

The low pressure system over California will continue to move inland and lift northward today, then overhead on Friday before exiting the region on Saturday. Showers and thunderstorms will overspread the CWA late this afternoon and tonight into Friday morning. Precipitation will trend lighter moving into Friday evening and conclude for the entirety of the forecast area by early Saturday morning.

The 48-hour National Blend mean QPF has increased slightly, sitting at roughly an inch across much of the forecast area, with closer to 1.25 to 1.50 inches across the central mountains eastward into the Island Park region. The 10th percentile is around 0.25" to 0.50" for much of eastern Idaho and closer to 0.75" for the central mountains into the Island Park region. The 90th percentile has increased to 1.50 to 2 inches for most of east Idaho, with around 2 inches for the central mountains. The official WPC forecast continues to run on the dry end, still sitting between the 10th and 25th percentile with much of the area forecast to receive less than 0.75" with 1 inch to 1.25 inches across the high elevations of the central mountains and Montana Divide region. Thus, a large spread continues to reflect a broad range of model solutions.

The snowfall forecast remains consistent with most of the snow falling above 7000 feet and mainly across the central mountains. There will be a 20 degree or so drop in temps between Thursday and Friday and temperatures Saturday morning will start off below freezing for many, but precipitation will largely be concluded by that time.

Dry weather is likely over the weekend into early next week. Temperatures will be a touch below average over the weekend and return to seasonable levels for next week.

Aviation

Issued at 533 PM MDT Thu Oct 22 2026

Widespread showers expected to increase through the evening period. A line of thunderstorms moving through the central Idaho mountains will push to the north through 04z. Another line of thunderstorms coming from Nevada and Utah will sweep into KBYI KPIH KIDA through 05Z By the time it reaches KDIJ it should be rain showers. Upper level low will move through the area during the next 24 hours producing widespread MVFR conditions due to ceilings and visibiilty with rain showers. Anticipate some IFR conditions with heavier rain showers. Winds will increase by 18z tomorrow in the Snake River airport sights.

Fire Weather

Issued at 102 AM MDT Thu Oct 22 2026

Isolated to scattered thunderstorms are expected today. Some gusts to 35 mph are possible near storms. Otherwise winds should remain light. The wetting rains should arrive tonight and continue into Friday.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.