| NWS Forecast for: Big Lost Highlands/Copper Basin Issued by: National Weather Service Pocatello, ID Last Update: 841 PM MDT Mon May 18 2026 | |
| Tonight: Partly cloudy. Lows 25 to 33. Tuesday: Increasing clouds. Highs 51 to 61. Tuesday Night: Mostly cloudy in the evening then clearing. Lows 27 to 36. Wednesday: Partly sunny. Highs 52 to 62. Wednesday Night: Mostly cloudy with a chance of rain showers, snow showers and a slight chance of thunderstorms. Lows 28 to 37. Thursday: Mostly sunny with a chance of snow showers. Highs 57 to 67. Thursday Night Through Friday Night: Partly cloudy. Lows 31 to 41. Highs 60 to 70. Saturday: Sunny. Highs 65 to 75. Saturday Night: Partly cloudy. Lows 37 to 47. Sunday And Sunday Night: Mostly clear. Highs 68 to 78. Lows 38 to 48. Memorial Day: Mostly sunny. Breezy. Highs 66 to 76. | |
| Zone Forecast: Big Lost Highlands/Copper Basin | |
Visit your local NWS office at: https://www.weather.gov/pih |