| NWS Forecast for: Upper Blackfoot and MacDonald Pass Issued by: National Weather Service Great Falls, MT Last Update: 336 AM MDT Sat Sep 19 2026 | |
| Today: Rain showers in the morning. Slight chance of thunderstorms through the day. Chance of rain showers in the afternoon. Highs 51 to 61. Northeast winds up to 10 mph. Chance of precipitation near 100 percent. Tonight: Mostly cloudy in the evening then becoming partly cloudy. Lows 39 to 45. 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 lower 40s. Southwest winds up to 5 mph. Monday: Sunny. Highs 65 to 73. Southwest winds up to 10 mph. Monday Night And Tuesday: Mostly clear. Lows in the mid 40s. Highs 65 to 73. Tuesday Night: Partly cloudy. Lows in the upper 40s. Wednesday Through Thursday Night: Mostly clear. Highs 66 to 74. Lows 45 to 51. Friday: Mostly sunny. Highs 64 to 72. | |
| Zone Forecast: Upper Blackfoot and MacDonald Pass | |
Visit your local NWS office at: https://www.weather.gov/tfx |