Grantsdale Weather Forecast

    • 30
    • 50

    Decreasing Clouds

    • 33
    • 58

    Partly Sunny

    • 38
    • 63

    Partly Sunny

    • 39
    • 65

    Chance Rain

    • 43
    • 70

    Partly Sunny

    • 43
    • 70

    Partly Sunny

Today 17 May Missoula/Bitterroot Valleys

Areas of rain and snow in the Morning, then rain Showers, snow Showers likely and a slight chance of Thunderstorms in the afternoon. Patchy fog early in the morning. Chance of precipitation 70 percent. Little or no new snow accumulation. Highs in the lower 50s. North Winds to 15 Mph with Gusts to around 30 Mph in the afternoon.

Tonight 17 May Missoula/Bitterroot Valleys

Mostly cloudy with a 40 percent chance of rain in the Evening, then partly cloudy after midnight. Widespread frost after midnight. Lows in the mid 20s to lower 30s. North Winds to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Real-Time

Grantsdale Temperature Statistics

May Temperature

Missoula, Missoula International Airport (49.1 miles)

  • Lowest 1 May, 2026

    31.6 °F

  • Average May

    55.8 °F

  • Highest 12 May, 2026

    82.7 °F

Climate (2021–Present)

Missoula, Missoula International Airport (49.1 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    47.7 °F

  • Average High 2021–2026

    59.8 °F
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