Granite State Park Weather Forecast

    • 40
    • 64

    Becoming Sunny

    • 43
    • 69

    Chance Rain

    • 38
    • 58

    Rain Showers

    • 40
    • 54

    Rain Showers Likely

    • 42
    • 64

    Rain Showers Likely

    • 41
    • 63

    Rain Likely

Today 24 May Butte/Blackfoot Region

Partly cloudy. Highs in the 70s. West Winds to 15 Mph in the afternoon.

Tonight 24 May Butte/Blackfoot Region

Mostly clear. Lows in the upper 30s to mid 40s. West Winds to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Granite State Park Temperature Statistics

May Temperature

Butte, Bert Mooney Airport (43.5 miles)

  • Lowest 19 May, 2026

    19.7 °F

  • Average May

    46.9 °F

  • Highest 13 May, 2026

    81.6 °F

Climate (2021–Present)

Butte, Bert Mooney Airport (43.5 miles)

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  • Average Low 2021–2026

    28.5 °F

  • Average 2021–2026

    42.4 °F

  • Average High 2021–2026

    55.8 °F
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