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Custer County, ID Weather Forecast
Custer County, ID Weather Forecast Date: 238 AM MDT Sun Sep 13 2026
The area/counties/county of: Lost River Valley, including: Howe, Arco, Mackay, Chilly, and Challis.or toggle through each period.
Today... Sunny, windy. Highs 63 to 73. Southwest winds 10 to 15 mph...Increasing to 20 to 30 mph in the afternoon.
Tonight... Mostly clear. Colder. Lows 31 to 40. West winds 10 to 20 mph.
Monday... Sunny. Highs 60 to 70. West winds up to 10 mph.
Monday Night... Mostly clear. Lows 33 to 40. North winds up to 10 mph.
Tuesday... Sunny. Highs 65 to 75. South winds up to 10 mph.
Tuesday Night... Mostly clear. Lows 37 to 46. Highs 65 to 75.
Wednesday... Mostly clear. Lows 37 to 46. Highs 65 to 75.
Thursday... Mostly sunny with a slight chance of showers and thunderstorms. Highs 66 to 76.
Thursday Night... Partly cloudy with a slight chance of rain. Lows 38 to 46.
Friday... Mostly clear. Highs 70 to 80. Lows 39 to 47.
POP = Probability of Precipitation
Custer County Radar Loop
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