| NWS Forecast for: Missouri Headwaters Issued by: National Weather Service Great Falls, MT Last Update: 336 PM MDT Tue Sep 22 2026 | |
| Tonight: Mostly cloudy. Slight chance of thunderstorms early in the evening. Chance of rain showers late in the evening, then slight chance of rain showers after midnight. Lows in the upper 40s. West winds up to 10 mph with gusts to around 30 mph. Chance of precipitation 50 percent. Wednesday: Sunny. Highs in the lower 70s. Southwest winds up to 10 mph. Wednesday Night: Mostly clear. Lows in the mid 40s. Southwest winds up to 5 mph with gusts to around 25 mph. Thursday: Sunny. Highs in the upper 70s. South winds up to 5 mph. Gusts up to 20 mph in the afternoon. Thursday Night: Partly cloudy. Lows in the upper 40s. South winds up to 5 mph with gusts to around 25 mph. Friday And Friday Night: Partly cloudy. Highs in the upper 70s. Lows in the mid 40s. Saturday: Cooler. Mostly sunny. Highs in the mid 60s. Saturday Night And Sunday: Mostly cloudy. Lows around 40. Highs in the mid 60s. Sunday Night And Monday: Mostly cloudy. A 20 percent chance of rain. Lows in the lower 40s. Highs in the lower 60s. Monday Night And Tuesday: Partly cloudy. Lows in the upper 30s. Highs in the mid 60s. | |
| Zone Forecast: Missouri Headwaters | |
Visit your local NWS office at: https://www.weather.gov/tfx |