Mandan Weather Forecast

    • 51
    • 64

    Increasing Clouds

    • 53
    • 67

    Partly Sunny

    • 52
    • 66

    Partly Sunny

    • 52
    • 66

    Mostly Cloudy

    • 54
    • 66

    Chance Rain Showers

    • 51
    • 66

    Rain Showers Likely

Today 24 Sep Keweenaw

Mostly cloudy. Highs in the mid 60s. South Winds 5 to 10 Mph, becoming southeast in the afternoon.

Tonight 24 Sep Keweenaw

Mostly cloudy. Patchy fog after midnight. Lows 50 to 55. Southeast Winds 5 to 10 Mph, becoming light southwest after midnight.

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Mandan Temperature Statistics

September Temperature

Copper Harbor (6.8 miles)

  • Lowest 22 September, 2026

    39.9 °F

  • Average September

    61.1 °F

  • Highest 1 September, 2026

    80.1 °F

Climate (2021–2026)

Copper Harbor (6.8 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    44.4 °F

  • Average High 2021–2026

    50.5 °F
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