South Arm Weather Forecast

    • 26
    • 47

    Mostly Cloudy

    • 31
    • 48

    Mostly Cloudy

    • 35
    • 49

    Chance Rain Showers

    • 31
    • 53

    Chance Rain/Snow

    • 17
    • 44

    Chance Snow Showers

    • 21
    • 45

    Partly Sunny

    • 27
    • 52

    Partly Sunny

Today 22 Mar Yellowstone National Park

Mostly sunny. Near steady temperature in the mid 40s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 22 Mar Yellowstone National Park

Mostly cloudy. Lows in the upper 20s.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Arm Temperature Statistics

March Temperature

Yellowstone Lake (14.9 miles)

  • Lowest 11 March, 2026

    -11.3 °F

  • Average March

    28.3 °F

  • Highest 19 March, 2026

    59 °F

Climate (2021–Present)

Yellowstone Lake (14.9 miles)

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  • Average Low 2021–2026

    23.1 °F

  • Average 2021–2026

    35.9 °F

  • Average High 2021–2026

    48.7 °F
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