Hart Lake Weather Forecast

    • 51
    • 65

    Mostly Cloudy

    • 49
    • 68

    Mostly Cloudy

    • 44
    • 65

    Mostly Cloudy

    • 40
    • 64

    Partly Sunny

    • 42
    • 64

    Partly Sunny

    • 45
    • 64

    Partly Sunny

Today 18 Sep Mahnomen

Mostly cloudy. Highs in the mid 60s. Southeast Winds around 10 Mph.

Tonight 18 Sep Mahnomen

Mostly cloudy. Lows 50 to 55. East Winds 5 to 15 Mph.

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Hart Lake Temperature Statistics

September Temperature

Mahnomen County Airport (10.6 miles)

  • Lowest 13 September, 2026

    37 °F

  • Average September

    63.5 °F

  • Highest 3 September, 2026

    85.5 °F

Climate (2021–2026)

Mahnomen County Airport (10.6 miles)

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  • Average Low 2021–2026

    32.2 °F

  • Average 2021–2026

    41.8 °F

  • Average High 2021–2026

    51.1 °F
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