Benchmark Airport Weather Forecast

    • 43
    • 73

    Decreasing Clouds

    • 42
    • 69

    Increasing Clouds

    • 47
    • 76

    Mostly Sunny

    • 35
    • 75

    Chance Rain

    • 32
    • 53

    Mostly Cloudy

    • 36
    • 58

    Mostly Cloudy

    • 34
    • 56

    Mostly Cloudy

Today 22 Sep Southern Rocky Mountain Front

Mostly cloudy. Lows 33 to 39. Highs 47 to 57.

Tonight 22 Sep Southern Rocky Mountain Front

Mostly cloudy until early morning then becoming partly cloudy. Lows 42 to 48. West Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Benchmark Airport Temperature Statistics

September Temperature

Missoula, Missoula International Airport (69 miles)

  • Lowest 9 September, 2026

    38.6 °F

  • Average September

    58.5 °F

  • Highest 1 September, 2026

    88.6 °F

Climate (2021–2026)

Missoula, Missoula International Airport (69 miles)

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  • Average Low 2021–2026

    36 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.7 °F
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