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Observed 5:45 AM MDT at KLLJ

Sun Valley, ID weather

Overcast and 34°1°.

Today: low 21°−6° (likely 21°−6° to 32°0°), high 49°9° (likely 44°7° to 49°9°).

Forecasts differ

Now 34°1°

Cloudy

Wind
3 mph5 km/h
From the north-northeast. Up to 6 mph10 km/h through 6 PM
Dew point
30°−1°
Dry, static shocks likely
UV index
0Low
Moderate 1–4 PM · peak 3
Air quality
0Good
Main pollutant: PM2.5 (fine particles)
Pressure
30.28 inHg1025 hPa
Rising slowly · +0.02 inHg+0.7 hPa in 3 h

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

Good hours for
  • Hard freeze until 11 AM (low 23°−5°)
  • Above 40°4° today by noon
  • Below 40°4° tonight after 8 PM
  • Hard freeze tonight 11 PM–11 AM (low 22°−6°)
  • Hard freeze tomorrow night from 1 AM (low 25°−4°)
  1. This morningUp to 35°2° by 11 AM · freezing, low 23°−5° · Partly cloudy
  2. This afternoonUp to 48°9° by 4 PM · Clear
  3. TonightDown to 24°−4° by 5 AM · freezing, low 24°−4° · Clear
  4. Tomorrow morningUp to 38°3° by 11 AM · freezing, low 22°−6° · Partly cloudy
  5. Tomorrow afternoonUp to 52°11° by 4 PM · Partly cloudy
  6. Tomorrow nightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Mostly cloudy
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 6aPartly cloudy25°−4° (likely 23°−5° to 35°2°)19°−7°0%5 mph8 km/h from N, gusts 3 mph5 km/h100%56%0
Sat 7aPartly cloudy25°−4° (likely 23°−5° to 35°2°)19°−7°0%5 mph8 km/h from NE, gusts 3 mph5 km/h100%60%0
Sat 8aPartly sunny24°−4° (likely 23°−5° to 35°2°)18°−8°0%5 mph8 km/h from NNE, gusts 3 mph4 km/h100%61%0
Sat 9aMostly sunny23°−5° (likely 23°−5° to 35°2°)17°−8°0%5 mph8 km/h from NNE, gusts 2 mph3 km/h100%60%0
Sat 10aMostly sunny29°−2° (likely 29°−2° to 36°2°)29°−2°0%2 mph3 km/h from WNW, gusts 2 mph3 km/h93%59%1
Sat 11aPartly sunny35°2° (likely 35°2° to 40°4°)35°2°0%1 mph2 km/h from W, gusts 4 mph6 km/h81%43%2
Sat 12pMostly sunny41°5° (likely 39°4° to 44°7°)41°5°0%1 mph2 km/h from S, gusts 3 mph6 km/h65%24%2
Sat 1pSunny45°7° (likely 41°5° to 47°8°)45°7°0%2 mph3 km/h from S, gusts 2 mph3 km/h56%15%3
Sat 2pSunny47°8° (likely 43°6° to 49°9°)45°7°0%5 mph8 km/h from S, gusts 4 mph7 km/h54%15%3
Sat 3pSunny47°8° (likely 44°7° to 49°9°)44°7°0%6 mph10 km/h from S, gusts 7 mph12 km/h53%11%3
Sat 4pSunny48°9° (likely 44°7° to 49°9°)45°7°0%6 mph10 km/h from S, gusts 8 mph13 km/h53%10%2
Sat 5pSunny47°8° (likely 42°6° to 48°9°)44°7°0%6 mph10 km/h from S, gusts 8 mph13 km/h58%9%1
Sat 6pSunny44°7° (likely 40°4° to 45°7°)41°5°0%5 mph8 km/h from S, gusts 8 mph13 km/h68%8%1
Sat 7pClear40°4° (likely 36°2° to 41°5°)40°4°0%2 mph3 km/h from SSE, gusts 8 mph12 km/h79%6%0
Sat 8pClear35°2° (likely 32°0° to 38°3°)35°2°0%1 mph2 km/h from E, gusts 5 mph8 km/h92%2%0
Sat 9pClear34°1° (likely 30°−1° to 37°3°)31°−1°0%3 mph5 km/h from ENE, gusts 3 mph4 km/h91%4%0
Sat 10pMostly clear33°1° (likely 29°−2° to 36°2°)29°−2°0%5 mph8 km/h from N, gusts 5 mph8 km/h92%17%0
Sat 11pClear32°0° (likely 27°−3° to 36°2°)27°−3°0%5 mph8 km/h from N, gusts 5 mph7 km/h91%24%0
Sun 12aClear30°−1° (likely 26°−3° to 36°2°)25°−4°0%5 mph8 km/h from N, gusts 3 mph5 km/h92%26%0
Sun 1aClear29°−2° (likely 26°−3° to 36°2°)25°−4°0%3 mph5 km/h from N, gusts 4 mph6 km/h96%22%0
Sun 2aMostly clear27°−3° (likely 26°−3° to 36°2°)23°−5°0%3 mph5 km/h from N, gusts 4 mph7 km/h97%15%0
Sun 3aClear26°−3° (likely 26°−3° to 36°2°)22°−6°0%3 mph5 km/h from NNE, gusts 5 mph7 km/h99%8%0
Sun 4aClear26°−3° (likely 26°−3° to 36°2°)22°−6°0%3 mph5 km/h from NNE, gusts 4 mph7 km/h98%4%0
Sun 5aMostly clear24°−4° (likely 24°−4° to 36°2°)20°−7°0%3 mph5 km/h from N, gusts 4 mph6 km/h99%37%0
Sun 6aClear24°−4° (likely 24°−4° to 37°3°)20°−7°0%3 mph5 km/h from N, gusts 4 mph6 km/h98%33%0
Sun 7aMostly clear23°−5° (likely 23°−5° to 37°3°)18°−8°0%3 mph5 km/h from N, gusts 4 mph6 km/h100%40%0
Sun 8aMostly sunny22°−6° (likely 22°−6° to 37°3°)17°−8°0%3 mph5 km/h from N, gusts 3 mph5 km/h100%44%0
Sun 9aSunny24°−4° (likely 24°−4° to 37°3°)24°−4°0%2 mph3 km/h from N, gusts 3 mph5 km/h93%33%0
Sun 10aMostly sunny32°0° (likely 32°0° to 41°5°)32°0°0%2 mph3 km/h from N, gusts 3 mph5 km/h76%17%1
Sun 11aSunny38°3° (likely 38°3° to 45°7°)38°3°0%2 mph3 km/h from N, gusts 4 mph6 km/h67%27%2
Sun 12pSunny45°7° (likely 44°7° to 49°9°)44°7°0%3 mph5 km/h from S, gusts 5 mph9 km/h52%33%3
Sun 1pMostly sunny49°9° (likely 46°8° to 52°11°)48°9°0%3 mph5 km/h from S, gusts 7 mph11 km/h46%37%4
Sun 2pMostly sunny50°10° (likely 47°8° to 53°12°)49°9°0%3 mph5 km/h from S, gusts 8 mph13 km/h44%29%4
Sun 3pPartly sunny51°11° (likely 47°8° to 53°12°)51°11°0%6 mph10 km/h from S, gusts 9 mph14 km/h43%46%4
Sun 4pPartly sunny52°11° (likely 47°8° to 53°12°)52°11°0%6 mph10 km/h from S, gusts 10 mph15 km/h43%49%3
Sun 5pPartly sunny50°10° (likely 45°7° to 51°11°)48°9°0%6 mph10 km/h from S, gusts 9 mph14 km/h47%60%2
Sun 6pCloudy46°8° (likely 42°6° to 49°9°)45°7°0%3 mph5 km/h from SSE, gusts 6 mph10 km/h58%66%1
Sun 7pCloudy42°6° (likely 41°5° to 44°7°)40°4°0%3 mph5 km/h from SSE, gusts 5 mph8 km/h69%68%0
Sun 8pCloudy38°3° (likely 38°3° to 42°6°)36°2°0%3 mph5 km/h from SSE, gusts 3 mph5 km/h78%76%0
Sun 9pCloudy35°2° (likely 35°2° to 41°5°)32°0°0%3 mph5 km/h from E, gusts 3 mph5 km/h84%77%0
Sun 10pCloudy34°1° (likely 34°1° to 39°4°)31°−1°0%3 mph5 km/h from E, gusts 4 mph6 km/h86%78%0
Sun 11pPartly cloudy33°1° (likely 33°1° to 39°4°)30°−1°0%3 mph5 km/h from E, gusts 4 mph6 km/h85%74%0
Mon 12aPartly cloudy33°1° (likely 33°1° to 39°4°)30°−1°0%3 mph5 km/h from NE, gusts 4 mph6 km/h84%75%0
Mon 1aPartly cloudy31°−1° (likely 29°−2° to 40°4°)28°−2°0%3 mph5 km/h from NE, gusts 4 mph6 km/h87%69%0
Mon 2aPartly cloudy29°−2° (likely 29°−2° to 40°4°)25°−4°0%3 mph5 km/h from NE, gusts 4 mph6 km/h92%67%0
Mon 3aPartly cloudy27°−3° (likely 27°−3° to 40°4°)23°−5°0%3 mph5 km/h from NE, gusts 4 mph6 km/h96%65%0
Mon 4aPartly cloudy26°−3° (likely 26°−3° to 40°4°)22°−6°0%3 mph5 km/h from NE, gusts 4 mph6 km/h98%73%0
Mon 5aPartly cloudy25°−4° (likely 25°−4° to 40°4°)21°−6°0%3 mph5 km/h from NE, gusts 3 mph6 km/h99%76%0

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Mostly sunny. High 49°9°, low 21°−6°. Typical 52°11° / 25°−4°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Mostly sunny, 24°−4°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 48°9°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 35°2°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 24°−4°

      Dry

    Official NWS forecast

    Today: Sunny. High near 49, with temperatures falling to around 47 in the afternoon. North wind 1 to 6 mph.

    Tonight: Mostly clear. Low around 21, with temperatures rising to around 24 overnight. Northeast wind 1 to 5 mph.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    44°7°–49°9°
    Low, likely
    21°−6°–32°0°
    Typical high / low
    52°11° / 25°−4°
    Wind
    8 mph13 km/h, gusts 16 mph26 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Cloudy. High 52°11°, low 23°−5°. Typical 52°11° / 25°−4°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 22°−6°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 52°11°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 38°3°

      Dry

    4. Overnight

      midnight–6 AM

      Partly cloudy, 25°−4°

      Dry

    Official NWS forecast

    Day: Sunny. High near 52, with temperatures falling to around 50 in the afternoon. South southeast wind 2 to 6 mph.

    Night: Mostly cloudy, with a low around 23. East wind around 3 mph.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    47°8°–53°12°
    Low, likely
    23°−5°–36°2°
    Typical high / low
    52°11° / 25°−4°
    Wind
    8 mph14 km/h, gusts 17 mph27 km/h
    UV peak
    4
  3. Monday, Oct 26. Rain. High 50°10°, low 23°−5°. Typical 51°11° / 24°−4°. Rain 0.13 in3.3 mm, 20% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 35°2°

      Dry

    2. Afternoon

      noon–6 PM

      Drizzle, 50°10°

      30% chance · 0.2 in0.4 cm

    3. Evening

      6 PM–midnight

      Showers, 39°4°

      60% chance · 0.07 in1.7 mm

    4. Overnight

      midnight–6 AM

      Drizzle, 29°−2°

      50% chance · 0.05 in1.3 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A slight chance of rain after noon. Mostly sunny, with a high near 50. East southeast wind 3 to 10 mph. Chance of precipitation is 20%.

    Night: Rain likely before 9pm, then rain and snow likely. Mostly cloudy, with a low around 23. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    44°7°–52°11°
    Low, likely
    23°−5°–38°3°
    Typical high / low
    51°11° / 24°−4°
    Wind
    12 mph20 km/h, gusts 36 mph57 km/h
    UV peak
    4
  4. Tuesday, Oct 27. Snow. High 45°7°, low 18°−8°. Typical 51°11° / 24°−4°. Snow 0.05 in1.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 27°−3°

      20% chance

    2. Afternoon

      noon–6 PM

      Cloudy, 41°5°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 34°1°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 25°−4°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of snow before 3pm, then a slight chance of rain and snow. Partly sunny, with a high near 45. Chance of precipitation is 30%.

    Night: Partly cloudy, with a low around 18.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    38°3°–45°7°
    Low, likely
    18°−8°–31°−1°
    Typical high / low
    51°11° / 24°−4°
    Wind
    10 mph15 km/h, gusts 30 mph47 km/h
    UV peak
    4
  5. Wednesday, Oct 28. Partly sunny. High 47°8°, low 23°−5°. Typical 50°10° / 24°−4°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 25°−4°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 44°7°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 34°1°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 32°0°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 47.

    Night: Partly cloudy, with a low around 23.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    40°4°–47°8°
    Low, likely
    21°−6°–28°−2°
    Typical high / low
    50°10° / 24°−4°
    Wind
    8 mph14 km/h, gusts 15 mph24 km/h
    UV peak
    4
  6. Thursday, Oct 29. Snow. High 48°9°, low 24°−4°. Typical 50°10° / 24°−4°. Snow 0–1 in0–3 cm, 10% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 34°1°

      Dry

    2. Afternoon

      noon–6 PM

      Drizzle, 44°7°

      20% chance · 0.04 in1 mm

    3. Evening

      6 PM–midnight

      Snow, 38°3°

      30% chance · 0.2 in0.5 cm

    4. Overnight

      midnight–6 AM

      Snow, 36°2°

      30% chance · 0.5 in1.3 cm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 48.

    Night: A slight chance of snow. Partly cloudy, with a low around 24. Chance of precipitation is 20%. Little or no snow accumulation expected.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    40°4°–48°9°
    Low, likely
    24°−4°–34°1°
    Typical high / low
    50°10° / 24°−4°
    Wind
    6 mph10 km/h, gusts 29 mph46 km/h
    UV peak
    2
  7. Friday, Oct 30. Snow. High 49°9°, low 23°−5°. Typical 49°9° / 23°−5°. Snow 0–3 in0–8 cm, 30% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Snow, 36°2°

      40% chance · 0.3 in0.7 cm

    2. Afternoon

      noon–6 PM

      Drizzle, 38°3°

      40% chance · 0.2 in0.4 cm

    3. Evening

      6 PM–midnight

      Drizzle, 32°0°

      30% chance · 0.01 in0.4 mm

    4. Overnight

      midnight–6 AM

      Cloudy, 27°−3°

      30% chance · 0.2 in0.4 cm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of snow before 3pm, then a chance of rain and snow. Partly sunny, with a high near 49. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Night: A chance of rain and snow. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    36°2°–49°9°
    Low, likely
    23°−5°–33°1°
    Typical high / low
    49°9° / 23°−5°
    Wind
    8 mph13 km/h, gusts 26 mph42 km/h
    UV peak
    2
  8. Saturday, Oct 31. Cloudy. High 36°2°, low 18°−8°. Typical 49°9° / 23°−5°. Rain 0.11 in2.8 mm, 30% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Sunny, 24°−5°

      30% chance · 0.4 in1.1 cm

    2. Afternoon

      noon–6 PM

      Cloudy, 36°2°

      20% chance · 0.1 in0.3 cm

    3. Evening

      6 PM–midnight

      Clear, 25°−4°

      20% chance

    4. Overnight

      midnight–6 AM

      Mostly clear, 18°−8°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    34°1°–38°3°
    Low, likely
    16°−9°–20°−7°
    Typical high / low
    49°9° / 23°−5°
    Wind
    11 mph17 km/h, gusts 33 mph53 km/h
    UV peak
    3
  9. Sunday, Nov 1. Partly sunny. High 41°5°, low 18°−8°. Typical 48°9° / 22°−6°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 21°−6°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 42°5°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 31°−1°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 27°−3°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    37°3°–47°8°
    Low, likely
    15°−9°–21°−6°
    Typical high / low
    48°9° / 22°−6°
    Wind
    6 mph9 km/h, gusts 14 mph22 km/h
    UV peak
    4
  10. Monday, Nov 2. Cloudy. High 43°6°, low 25°−4°. Typical 48°9° / 22°−6°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Partly sunny, 32°0°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 47°8°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 35°2°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    38°3°–52°11°
    Low, likely
    21°−6°–30°−1°
    Typical high / low
    48°9° / 22°−6°
    Wind
    7 mph11 km/h, gusts 19 mph31 km/h
    UV peak
    3

The outlook

  1. Today

    Dry, high 49°, low 21°.

  2. Tomorrow

    Dry, high 52°, low 23°, warming up.

  3. Monday

    Dry, high 50°, low 23°.

  4. Rest of week

    Mostly dry, highs 36–49°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PIH) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Big Wood River near Ketchum

8.4 mi
Below flood stage
Level
5.1 ft
Flow
70 cfs

Forecast peak 5.6 ft Sat 12 PM

Reading from Sat 3:45 AM · NWS gauge page

Big Wood River at Hailey

12 mi
Below flood stage
Level
1.9 ft
Flow
230 cfs

Forecast peak 1.8 ft Sat 6 AM

Reading from Sat 3:45 AM · NWS gauge page

Trail Creek (ID) at Ketchum

1.4 mi
Below flood stage
Level
5.1 ft
Flow
17 cfs

Reading from Sat 4:15 AM · NWS gauge page

East Fork Big Wood River at Gimlet

5.6 mi
Below flood stage
Level
5.2 ft
Flow
20 cfs

Reading from Sat 4:15 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 70% less heating than a typical week.

This week 59Typical 193

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
41
h below 17°F
0
h below 5°F
0

47, 17 and 5°F are the test points heat pumps are rated at. About 14 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 30°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Ketchum Ranger Station · official normals 1991–2020 · records 1937–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Normal high / low
52°11° / 25°−4°
Forecast high / low
49°9° / 21°−6°
Record high
73°23° in 1937
Record low
8°−13° in 1964

Last 7 days vs normal

On average 9°5° warmer than normal (daily mean temperature).

  1. +6°+3°SunOct 18
  2. +6°+3°MonOct 19
  3. +7°+4°TueOct 20
  4. +9°+5°WedOct 21
  5. +13°+7°ThuOct 22
  6. +12°+7°FriOct 23
  7. —SatOct 24

Sun Valley weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 8:03 AM, sunset 6:39 PM.

Daylight
10 h 36 min
Losing 2 min 49 s a day; shortest Dec 21, 1 h 41 min less
Golden hour
5:59–6:57 PM
Morning 7:45–8:43 AM
Blue hour
6:57–7:08 PM
Morning 7:33–7:45 AM; first light 7:33 AM

Stars tonight? Poor

Clouds most of the night (about 58% cover).

Moon

Waxing gibbous

96% lit · growing

Today
sets 6:20 AM · rises 5:39 PM
Full moon
Oct 25
New moon
Nov 9
Looking northeast from Sun Valley. The highest point on the skyline is about 11,000 ft, 14 mi away.Skyline from USGS elevation data, heights drawn up to 2× taller. Sky, sun and moon as they are now.