St. Ignatius Airport Weather Forecast
- 53
- 83
Chance Rain
- 51
- 80
Slight Chance Thunderstorms
- 49
- 77
Rain Showers Likely
- 48
- 72
Chance Rain
- 48
- 72
Rain Likely
- 49
- 69
Rain Showers Likely
Today 7 Sep Flathead/Mission Valleys
Mostly cloudy. Areas of smoke through the day. Areas of rain until late afternoon. Slight chance of Thunderstorms in the afternoon. Chance of rain Showers late in the afternoon. Chance of precipitation 30 percent. Some Thunderstorms may produce gusty Winds. Highs in the upper 70s to mid 80s.
Tonight 7 Sep Flathead/Mission Valleys
Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly cloudy with a chance of rain after midnight. Patchy smoke through the night. Chance of precipitation 30 percent. Some Thunderstorms may produce gusty Winds. Lows in the upper 40s to mid 50s.
St. Ignatius Airport Temperature Statistics
September Temperature
Missoula, Missoula International Airport (27.3 miles)
Lowest 1 September, 2025
52 °FAverage September
70.8 °FHighest 2 September, 2025
96.1 °F
Climate (2020–Present)
Missoula, Missoula International Airport (27.3 miles)
Average Low 2020–2025
35.5 °FAverage 2020–2025
47 °FAverage High 2020–2025
59.2 °F