South Arm Weather Forecast

    • 49
    • 74

    Areas Smoke

    • 50
    • 76

    Mostly Sunny

    • 52
    • 76

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

    • 50
    • 75

    Mostly Sunny

    • 50
    • 73

    Partly Sunny

    • 48
    • 72

    Partly Sunny

Today 6 Aug Yellowstone National Park

Sunny. Areas of smoke. Highs in the upper 70s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 6 Aug Yellowstone National Park

Clear. Areas of smoke. Lows in the upper 40s. West Winds 10 to 15 Mph with Gusts up to 25 Mph in the evening.

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  • Temperature Real-Time

South Arm Temperature Statistics

August Temperature

Yellowstone Lake (14.9 miles)

  • Lowest 4 August, 2026

    33.1 °F

  • Average August

    58.6 °F

  • Highest 1 August, 2026

    85.6 °F

Climate (2021–2026)

Yellowstone Lake (14.9 miles)

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  • Average Low 2021–2026

    22.9 °F

  • Average 2021–2026

    35.7 °F

  • Average High 2021–2026

    48.5 °F
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