| NWS Forecast for: Helena Valley Issued by: National Weather Service Great Falls, MT Last Update: 1232 AM MDT Thu Aug 27 2026 | |
| Rest Of Tonight: Partly cloudy. Chance of rain showers and slight chance of dry thunderstorms. Patchy smoke after midnight. Highs in the upper 80s. Lows 52 to 58. South winds up to 10 mph. Chance of precipitation 40 percent. Friday: Cloudy in the morning then becoming partly sunny. Patchy smoke in the morning. Highs in the lower 80s. South winds up to 10 mph. Friday Night: Mostly cloudy. A 20 percent chance of rain showers after midnight. Lows in the mid 50s. South winds up to 10 mph. Saturday: Mostly cloudy. Chance of rain showers in the morning, then rain showers likely and chance of thunderstorms in the afternoon. Highs in the mid 70s. South winds up to 10 mph. Chance of precipitation 70 percent. Saturday Night: Rain showers and chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms after midnight. Lows in the upper 40s. West winds up to 10 mph. Chance of precipitation 90 percent. Sunday: Partly sunny with a 50 percent chance of rain showers. Highs around 70. Sunday Night And Monday: Mostly clear. Lows in the lower 40s. Highs in the upper 70s. Monday Night: Mostly clear. Lows in the upper 40s. Tuesday: Sunny. A 20 percent chance of rain showers in the afternoon. Highs in the upper 70s. Tuesday Night: Mostly cloudy with chance of rain showers and slight chance of thunderstorms in the evening, then partly cloudy after midnight. Lows in the upper 40s. Chance of precipitation 30 percent. Wednesday: Mostly sunny. A 20 percent chance of thunderstorms in the afternoon. Highs in the mid 70s. Wednesday Night: Partly cloudy with a 20 percent chance of rain showers in the evening, then mostly cloudy after midnight. Lows in the upper 40s. Thursday: Mostly sunny with a 20 percent chance of rain showers. Highs in the lower 70s. | |
| Zone Forecast: Helena Valley | |
Visit your local NWS office at: https://www.weather.gov/tfx |