Mandan Lake Weather Forecast

    • 63
    • 87

    Slight Chance Thunderstorms

    • 67
    • 89

    Mostly Sunny

    • 68
    • 92

    Slight Chance Thunderstorms

    • 56
    • 83

    Slight Chance Thunderstorms

    • 50
    • 76

    Mostly Sunny

    • 46
    • 70

    Mostly Sunny

Today 18 Aug Oliver

Mostly sunny with a 20 percent chance of Showers. Highs in the mid 80s. Northwest Winds around 5 Mph.

Tonight 18 Aug Oliver

Partly cloudy with a slight chance of Showers and Thunderstorms in the Evening, then mostly clear after midnight. Patchy fog. Lows in the lower 60s. East Winds around 5 Mph, becoming southeast after midnight. Chance of rain 20 percent.

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Mandan Lake Temperature Statistics

August Temperature

HAZEN (18.6 miles)

  • Lowest 15 August, 2025

    50 °F

  • Average August

    68.7 °F

  • Highest 7 August, 2025

    89.6 °F

Climate (2020–Present)

HAZEN (18.6 miles)

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  • Average Low 2020–2025

    29.8 °F

  • Average 2020–2025

    42.9 °F

  • Average High 2020–2025

    54.9 °F
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