Grassy Lake Weather Forecast

    • 41
    • 61

    Mostly Sunny

    • 42
    • 64

    Mostly Sunny

    • 36
    • 62

    Rain Showers Likely

    • 30
    • 40

    Chance Rain/Snow

    • 37
    • 52

    Mostly Sunny

    • 42
    • 62

    Mostly Sunny

Today 2 May Gallatin and Madison County Mountains and Centennial Mountains

Warmer, sunny. Highs 55 to 65. Southwest Winds up to 10 Mph.

Tonight 2 May Gallatin and Madison County Mountains and Centennial Mountains

Clear. Lows 35 to 40. South Winds 5 to 10 Mph.

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  • Temperature Real-Time

Grassy Lake Temperature Statistics

May Temperature

Ennis - Big Sky Airport (11.2 miles)

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  • Average May

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Climate (2020–Present)

Ennis - Big Sky Airport (11.2 miles)

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  • Average Low 2020–2025

    31.3 °F

  • Average 2020–2025

    43.6 °F

  • Average High 2020–2025

    55.5 °F
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