Grinnell Lake Weather Forecast

    • 60
    • 83

    Partly Sunny

    • 59
    • 84

    Increasing Clouds

    • 55
    • 82

    Partly Sunny

    • 55
    • 80

    Chance Thunderstorms

    • 56
    • 81

    Chance Thunderstorms

    • 56
    • 83

    Mostly Sunny

    • 58
    • 85

    Mostly Sunny

Today 20 Jul Shirley Basin

Sunny, hot. Near steady temperature in the mid 80s. West Winds around 15 Mph with Gusts up to 25 Mph.

Tonight 20 Jul Shirley Basin

Mostly clear. Lows in the lower 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Grinnell Lake Temperature Statistics

July Temperature

Elk Mountain AWOS (34.8 miles)

  • Lowest 12 July, 2025

    46.4 °F

  • Average July

    67.7 °F

  • Highest 13 July, 2025

    87.8 °F

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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