Yellowstone Lake Weather Forecast

    • 49
    • 71

    Partly Sunny

    • 48
    • 69

    Chance Thunderstorms

    • 47
    • 67

    Chance Thunderstorms

    • 48
    • 70

    Mostly Sunny

    • 49
    • 74

    Mostly Sunny

    • 50
    • 74

    Mostly Sunny

Today 15 Aug Yellowstone National Park

Mostly sunny. Highs in the mid 70s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 15 Aug Yellowstone National Park

Partly cloudy in the Evening, then clearing. Lows in the mid 40s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Yellowstone Lake Temperature Statistics

August Temperature

Yellowstone Lake (4.3 miles)

  • Lowest 9 August, 2025

    30.8 °F

  • Average August

    55.1 °F

  • Highest 6 August, 2025

    80.7 °F

Climate (2020–Present)

Yellowstone Lake (4.3 miles)

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  • Average Low 2020–2025

    22.3 °F

  • Average 2020–2025

    35.1 °F

  • Average High 2020–2025

    48 °F
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