Mission Reservoir Weather Forecast

    • 48
    • 70

    Gradual Clearing

    • 49
    • 68

    Mostly Sunny

    • 53
    • 78

    Partly Sunny

    • 49
    • 72

    Mostly Sunny

    • 51
    • 81

    Partly Sunny

    • 49
    • 72

    Slight Chance Rain

Today 8 May Flathead/Mission Valleys

Mostly cloudy. A 20 percent chance of rain late in the afternoon. Highs in the 70s. Southwest Winds to 15 Mph in the afternoon.

Tonight 8 May Flathead/Mission Valleys

Mostly cloudy in the evening then becoming partly cloudy. Lows in the 40s. Southwest Winds to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mission Reservoir Temperature Statistics

May Temperature

Missoula, Missoula International Airport (27.3 miles)

  • Lowest 1 May, 2026

    31.6 °F

  • Average May

    54.3 °F

  • Highest 3 May, 2026

    77.6 °F

Climate (2021–Present)

Missoula, Missoula International Airport (27.3 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    59.8 °F
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