| NWS Forecast for: Upper Blackfoot and MacDonald Pass Issued by: National Weather Service Great Falls, MT Last Update: 1022 PM MDT Fri Sep 18 2026 |  |
| Rest Of Tonight: Rain showers late in the evening. Slight chance of thunderstorms through the night. Rain after midnight. Lows in the upper 40s. Northeast winds up to 10 mph. Chance of precipitation near 100 percent. Saturday: Rain showers and slight chance of thunderstorms in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 53 to 59. Northeast winds up to 10 mph. Chance of precipitation near 100 percent. Saturday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows in the mid 40s. Northeast winds up to 5 mph shifting to the west after midnight. Sunday: Warmer. Mostly sunny. Highs 61 to 69. Southwest winds up to 5 mph. Sunday Night: Mostly clear. Lows in the mid 40s. Southwest winds up to 5 mph. Monday Through Thursday Night: Mostly clear. Highs 64 to 75. Lows in the upper 40s. Friday: Mostly sunny. Highs 66 to 74. | |
| Zone Forecast: Upper Blackfoot and MacDonald Pass | |
Visit your local NWS office at: https://www.weather.gov/tfx |