Grinnell Lake Weather Forecast

    • 29
    • 49

    Slight Chance Thunderstorms

    • 39
    • 56

    Mostly Sunny

    • 41
    • 66

    Mostly Sunny

    • 43
    • 68

    Chance Rain Showers

    • 34
    • 56

    Rain Showers Likely

    • 34
    • 43

    Rain Showers Likely

    • 37
    • 54

    Chance Rain Showers

Today 1 May Shirley Basin

Partly sunny with a chance of Showers with a slight chance of Thunderstorms. Near steady temperature in the upper 40s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

Tonight 1 May Shirley Basin

Mostly clear. Cold with Lows in the mid 20s. North Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming northwest around 5 Mph after midnight.

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Grinnell Lake Temperature Statistics

May Temperature

Elk Mountain AWOS (34.8 miles)

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Climate (2020–Present)

Elk Mountain AWOS (34.8 miles)

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  • Average Low 2020–2025

    33.9 °F

  • Average 2020–2025

    44.4 °F

  • Average High 2020–2025

    54.7 °F
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