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Sun Valley, ID weather
Loading live data…Mostly clear,much the same tomorrow
NWS, the American and the European model agree on a high near 63° in Sun Valley today. Tomorrow: cloudy, around 64°, with a 0% chance of rain.
Latest for Sun Valley: NWS (National Blend (NBM)): 43° Clear · American (NOAA GFS): 45° Clear · European (ECMWF): 43° Clear.
CheckWeather.io on iPhoneFree. No ads, no account.Sun Valley weather alerts and warnings
active National Weather Service watches, warnings and advisoriesChecking the National Weather Service for active alerts covering Sun Valley…
Sun Valley weather in numbers
from 30 years of measured normalsSun Valley swings 72°F across the year, from 80°F highs in July to 8°F lows in January, and December is usually the wettest month in a year that brings about 17 in of precipitation.
The weather map: all three models at once
NWS, American, European side by side around Sun Valley and nearby towns.Live rain radar →Sun Valley hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
Sun Valley 10-day forecast, out to 14 days
where the models agree, and where they splitSun Valley, Idaho (ID) is at its warmest in Jul (average highs near 80°F) and coldest in Jan (lows around 8°F), with roughly 17 in of precipitation across the year. Below, compare what NWS, American, European forecast for Sun Valley right now, and see exactly where they disagree.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
Sun Valley climate by month
average daytime high and overnight low across a typical year (1991-2020)Source: 1991-2020 normals, Ketchum Ranger Station (NOAA).
How the weather around Sun Valley has changed since 1995
Sun Valley sits in the same roughly 50 km square of NASA's reanalysis as Hailey. That square shows no clear change in temperature between 1995-2004 and 2015-2024. See the full 30-year picture on the Hailey page.
Which forecast is most accurate in the US?
CheckWeather Score, graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.
What do you think of the forecasts?
your vote countsThe accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.
One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.
Where the models disagree
temperature and rain, judged separatelyThe models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.