Mandan Lake Weather Forecast

    • 50
    • 72

    Mostly Cloudy

    • 49
    • 70

    Chance Rain Showers

    • 46
    • 66

    Chance Rain Showers

    • 45
    • 72

    Partly Sunny

    • 49
    • 72

    Mostly Cloudy

    • 50
    • 75

    Partly Sunny

Today 18 Sep Oliver

Patchy fog in the morning. Mostly cloudy. Highs around 70. Southeast Winds 5 to 15 Mph.

Tonight 18 Sep Oliver

Mostly cloudy. Patchy fog after midnight. Lows in the upper 40s. Southeast Winds around 10 Mph.

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Mandan Lake Temperature Statistics

September Temperature

HAZEN (18.6 miles)

  • Lowest 13 September, 2026

    35.6 °F

  • Average September

    66.1 °F

  • Highest 7 September, 2026

    95 °F

Climate (2021–2026)

HAZEN (18.6 miles)

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  • Average Low 2021–2026

    30.4 °F

  • Average 2021–2026

    43.2 °F

  • Average High 2021–2026

    55 °F
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