Mandan Lake Weather Forecast

    • 5
    • 14

    Increasing Clouds

    • 17
    • 32

    Mostly Cloudy

    • 7
    • 35

    Mostly Cloudy

    • 17
    • 27

    Mostly Cloudy

    • 22
    • 37

    Mostly Cloudy

    • 15
    • 37

    Mostly Cloudy

Today 20 Dec Oliver

Sunny. Much Colder. Highs around 15. Northwest Winds 10 to 20 Mph with Gusts up to 30 Mph.

Tonight 20 Dec Oliver

Partly cloudy. Lows zero to 5 above. Temperature rising after midnight. East Winds around 5 Mph, becoming south after midnight.

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Mandan Lake Temperature Statistics

December Temperature

HAZEN (18.6 miles)

  • Lowest 7 December, 2025

    -18.4 °F

  • Average December

    15.9 °F

  • Highest 16 December, 2025

    44.6 °F

Climate (2020–Present)

HAZEN (18.6 miles)

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  • Average Low 2020–2025

    30.1 °F

  • Average 2020–2025

    43.1 °F

  • Average High 2020–2025

    55.1 °F
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