| NWS Forecast for: Big Belt, Bridger and Castle Mountains Issued by: National Weather Service Great Falls, MT Last Update: 1232 PM MDT Thu Sep 10 2026 | |
| Rest Of Today: Breezy, warmer, sunny. Highs 69 to 79. West winds 15 to 25 mph with gusts to around 45 mph. Tonight: Partly cloudy. A 20 percent chance of rain showers after midnight. Lows in the mid 40s. West winds 5 to 15 mph. Gusts up to 45 mph decreasing to 25 mph after midnight. Friday: Cooler. Partly sunny. Chance of rain showers in the morning, then slight chance of thunderstorms in the afternoon. Highs 53 to 63. Northwest winds 5 to 15 mph with gusts to around 30 mph. Chance of precipitation 50 percent. Friday Night: Mostly cloudy with a 20 percent chance of rain showers. Lows in the lower 40s. Northeast winds 5 to 15 mph with gusts to around 30 mph. Saturday: Mostly cloudy in the morning then becoming mostly sunny. Highs 49 to 61. East winds up to 10 mph with gusts to around 25 mph. Saturday Night: Mostly cloudy. Slight chance of rain showers in the evening, then chance of rain showers after midnight. Lows around 40. Chance of showers 40 percent. Sunday And Sunday Night: Mostly cloudy. Chance of rain showers and slight chance of thunderstorms. Highs 45 to 55. Lows in the upper 30s. Chance of precipitation 50 percent. Monday: Mostly sunny. A 20 percent chance of rain showers in the morning. Highs 47 to 57. Monday Night Through Wednesday: Partly cloudy. Lows in the upper 30s. Highs 51 to 63. | |
| Zone Forecast: Big Belt, Bridger and Castle Mountains | |
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