Lake Sakakawea State Park Weather Forecast

    • 54
    • 81

    Decreasing Clouds

    • 60
    • 81

    Partly Sunny

    • 59
    • 85

    Partly Sunny

    • 64
    • 90

    Slight Chance Thunderstorms

    • 59
    • 88

    Partly Sunny

    • 54
    • 80

    Chance Rain Showers

    • 55
    • 76

    Chance Rain Showers

Today 1 Sep Mercer

Partly sunny. Highs in the lower 80s. Temperature falling into the in the upper 70s late. Southeast Winds around 5 Mph.

Tonight 1 Sep Mercer

Mostly cloudy in the evening then clearing. Lows in the upper 40s. Southeast Winds around 5 Mph.

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Lake Sakakawea State Park Temperature Statistics

September Temperature

Garrison (8.1 miles)

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  • Average September

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Climate (2021–2026)

Garrison (8.1 miles)

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  • Average Low 2021–2026

    31.2 °F

  • Average 2021–2026

    42.6 °F

  • Average High 2021–2026

    54 °F
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