Grantsdale Weather Forecast

    • 40
    • 61

    Increasing Clouds

    • 42
    • 62

    Rain Likely

    • 40
    • 65

    Chance Rain

    • 43
    • 71

    Chance Rain

    • 48
    • 79

    Mostly Sunny

    • 51
    • 84

    Partly Sunny

Today 21 May Missoula/Bitterroot Valleys

Partly cloudy with a 20 percent chance of rain. Widespread frost early in the morning. Highs near 60.

Tonight 21 May Missoula/Bitterroot Valleys

Mostly clear in the evening then becoming mostly cloudy. Lows near 40.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grantsdale Temperature Statistics

May Temperature

Missoula, Missoula International Airport (49.1 miles)

  • Lowest 6 May, 2025

    28.9 °F

  • Average May

    54.4 °F

  • Highest 9 May, 2025

    85.6 °F

Climate (2020–Present)

Missoula, Missoula International Airport (49.1 miles)

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  • Average Low 2020–2025

    35.4 °F

  • Average 2020–2025

    46.8 °F

  • Average High 2020–2025

    59 °F
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