| NWS Forecast for: Custer County Issued by: National Weather Service Billings, MT Last Update: 350 PM MDT Wed Jul 22 2026 | |
| Tonight: Mostly cloudy. Lows in the mid 60s. East winds 5 to 15 mph. Thursday: Mostly sunny. Highs in the mid 90s. South winds 5 to 10 mph. Thursday Night: Mostly clear. Lows in the upper 60s. South winds 5 to 10 mph. Friday: Sunny. Highs around 105. West winds 5 to 15 mph. Friday Night: Mostly clear. Lows in the upper 60s. Northwest winds 5 to 15 mph in the evening shifting to the southwest 5 to 10 mph overnight. Saturday: Sunny. Highs around 107. Saturday Night: Partly cloudy. Chance of showers and slight chance of thunderstorms in the evening. Lows in the lower 70s. Chance of precipitation 30 percent. Sunday: Sunny. Highs around 103. Sunday Night: Partly cloudy. A 20 percent chance of showers overnight. Lows around 70. Monday: Sunny. Highs in the upper 90s. Monday Night: Partly cloudy. A 20 percent chance of showers overnight. Lows in the upper 60s. Tuesday: Sunny. Highs around 100. Tuesday Night: Partly cloudy. Lows in the upper 60s. Wednesday: Sunny. Highs in the upper 90s. | |
| Zone Forecast: Custer County | |
Visit your local NWS office at: https://www.weather.gov/byz |