Sepulcher Mountain Weather Forecast

    • 42
    • 67

    Mostly Sunny

    • 45
    • 66

    Partly Sunny

    • 44
    • 67

    Mostly Sunny

    • 38
    • 59

    Chance Rain Showers

    • 38
    • 56

    Mostly Sunny

    • 43
    • 64

    Mostly Sunny

Today 18 Sep Yellowstone National Park

Areas of fog this morning. Sunny. Highs in the mid 60s. Southwest Winds around 10 Mph.

Tonight 18 Sep Yellowstone National Park

Mostly clear. Lows in the mid 30s. West Winds around 10 Mph in the evening.

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Sepulcher Mountain Temperature Statistics

September Temperature

West Yellowstone (26.7 miles)

  • Lowest 6 September, 2025

    28.4 °F

  • Average September

    53.3 °F

  • Highest 3 September, 2025

    82.4 °F

Climate (2020–Present)

West Yellowstone (26.7 miles)

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  • Average Low 2020–2025

    33.5 °F

  • Average 2020–2025

    50.7 °F

  • Average High 2020–2025

    66 °F
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