South Arm Weather Forecast

    • 18
    • 43

    Mostly Sunny

    • 21
    • 41

    Increasing Clouds

    • 20
    • 39

    Partly Sunny

    • 25
    • 39

    Snow Showers Likely

    • 15
    • 34

    Snow Showers Likely

    • 13
    • 28

    Chance Snow Showers

    • 9
    • 28

    Snow Showers Likely

Today 5 Feb Yellowstone National Park

Sunny. Highs in the upper 40s.

Tonight 5 Feb Yellowstone National Park

Clear, cold with Lows around 20.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Arm Temperature Statistics

February Temperature

Yellowstone Lake (14.9 miles)

  • Lowest 1 February, 2026

    12 °F

  • Average February

    25.9 °F

  • Highest 1 February, 2026

    37.9 °F

Climate (2021–Present)

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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