Mandan Lake Weather Forecast

    • 52
    • 78

    Chance Rain Showers

    • 54
    • 79

    Partly Sunny

    • 52
    • 74

    Chance Rain Showers

    • 52
    • 65

    Chance Rain Showers

    • 53
    • 67

    Chance Rain Showers

    • 51
    • 73

    Mostly Cloudy

Today 15 Sep Oliver

Decreasing Clouds. A chance of Showers. A chance of Thunderstorms late in the Morning, then a slight chance of Thunderstorms in the afternoon. Highs in the upper 70s. West Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

Tonight 15 Sep Oliver

Partly cloudy. Patchy fog. A chance of Showers after midnight. Lows in the lower 50s. West Winds around 5 Mph. Chance of rain 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mandan Lake Temperature Statistics

September Temperature

HAZEN (18.6 miles)

  • Lowest 6 September, 2025

    32 °F

  • Average September

    62.1 °F

  • Highest 12 September, 2025

    87.8 °F

Climate (2020–Present)

HAZEN (18.6 miles)

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  • Average Low 2020–2025

    29.9 °F

  • Average 2020–2025

    43 °F

  • Average High 2020–2025

    55 °F
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