Flat Mountain Arm Weather Forecast

    • 25
    • 47

    Becoming Sunny

    • 28
    • 55

    Mostly Sunny

    • 29
    • 61

    Mostly Sunny

    • 32
    • 62

    Rain Showers Likely

    • 26
    • 49

    Rain Showers Likely

    • 29
    • 52

    Chance Rain Showers

    • 32
    • 59

    Slight Chance Rain Showers

Today 1 May Yellowstone National Park

Mostly sunny. Highs around 50. Northwest Winds around 10 Mph with Gusts up to 20 Mph.

Tonight 1 May Yellowstone National Park

Clear. Lows in the upper 20s.

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Flat Mountain Arm Temperature Statistics

May Temperature

Yellowstone Lake (11.2 miles)

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Climate (2020–Present)

Yellowstone Lake (11.2 miles)

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  • Average Low 2020–2025

    22.3 °F

  • Average 2020–2025

    35 °F

  • Average High 2020–2025

    47.7 °F
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