Pompeys Pillar National Historic Landmark Weather Forecast

    • 42
    • 71

    Slight Chance Rain Showers

    • 47
    • 75

    Mostly Sunny

    • 46
    • 72

    Mostly Sunny

    • 53
    • 80

    Partly Sunny

    • 50
    • 77

    Chance Rain Showers

    • 48
    • 76

    Slight Chance Rain Showers

Today 14 Sep Northeastern Yellowstone

Mostly cloudy with a 20 percent chance of rain Showers early in the Morning, then sunny in the late morning and afternoon. Windy in the afternoon. Cooler. Highs in the lower 70s. West Winds 10 to 20 Mph in the morning increasing to 20 to 35 Mph with Gusts to around 40 Mph in the afternoon.

Tonight 14 Sep Northeastern Yellowstone

Mostly clear. Lows in the lower 40s. Northwest Winds 10 to 20 Mph in the evening becoming light overnight.

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  • Temperature Real-Time

Pompeys Pillar National Historic Landmark Temperature Statistics

September Temperature

Billings, Billings Logan International Airport (28.6 miles)

  • Lowest 9 September, 2026

    46.7 °F

  • Average September

    68.1 °F

  • Highest 4 September, 2026

    92.6 °F

Climate (2021–2026)

Billings, Billings Logan International Airport (28.6 miles)

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  • Average Low 2021–2026

    39.1 °F

  • Average 2021–2026

    50 °F

  • Average High 2021–2026

    61.2 °F
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