Willow Creek Reservoir Weather Forecast

    • 50
    • 78

    Increasing Clouds

    • 48
    • 79

    Partly Sunny

    • 53
    • 82

    Mostly Sunny

    • 43
    • 71

    Partly Sunny

    • 45
    • 70

    Mostly Sunny

    • 48
    • 79

    Mostly Sunny

Today 18 Sep Southern High Plains

Sunny. Highs 75 to 80. Northwest Winds up to 5 Mph shifting to the northeast in the afternoon.

Tonight 18 Sep Southern High Plains

Mostly clear. Lows 45 to 50. Northeast Winds up to 10 Mph shifting to the west after midnight.

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Willow Creek Reservoir Temperature Statistics

September Temperature

Great Falls, Great Falls International Airport (49.7 miles)

  • Lowest 5 September, 2025

    39.9 °F

  • Average September

    64.6 °F

  • Highest 1 September, 2025

    90 °F

Climate (2020–Present)

Great Falls, Great Falls International Airport (49.7 miles)

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  • Average Low 2020–2025

    34 °F

  • Average 2020–2025

    46.4 °F

  • Average High 2020–2025

    58.3 °F
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