Ninepipe Reservoir Weather Forecast

    • 51
    • 84

    Chance Rain

    • 49
    • 73

    Rain Likely

    • 50
    • 77

    Chance Thunderstorms

    • 53
    • 80

    Chance Thunderstorms

    • 49
    • 78

    Rain Showers Likely

    • 44
    • 65

    Rain Showers Likely

    • 44
    • 70

    Chance Rain

Today 25 May Flathead/Mission Valleys

Mostly sunny. Highs in the 80s. South Winds to 15 Mph.

Tonight 25 May Flathead/Mission Valleys

Mostly cloudy. Chance of rain Showers and a slight chance of Thunderstorms early in the Evening, then Areas of rain in the late evening and early morning. Chance of precipitation 40 percent. Some Thunderstorms may produce gusty Winds. Lows in the upper 40s to mid 50s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ninepipe Reservoir Temperature Statistics

May Temperature

Missoula, Missoula International Airport (36 miles)

  • Lowest 18 May, 2026

    26.7 °F

  • Average May

    53.3 °F

  • Highest 12 May, 2026

    82.7 °F

Climate (2021–Present)

Missoula, Missoula International Airport (36 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    59.9 °F
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