Hart Lake Weather Forecast

    • 65
    • 80

    Chance Thunderstorms

    • 65
    • 77

    Rain Showers

    • 54
    • 79

    Mostly Sunny

    • 47
    • 70

    Partly Sunny

    • 54
    • 76

    Mostly Sunny

    • 50
    • 76

    Partly Sunny

Today 6 Sep Mahnomen

Mostly cloudy with a slight chance of Thunderstorms. A slight chance of Showers this Morning, then a chance of Showers this afternoon. Highs 80 to 85. Southeast Winds 5 to 15 Mph. Chance of rain 50 percent.

Tonight 6 Sep Mahnomen

Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms in the Evening, then a chance of Thunderstorms after midnight. Lows in the mid 60s. Southeast Winds 5 to 15 Mph. Chance of rain 40 percent.

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Hart Lake Temperature Statistics

September Temperature

Mahnomen County Airport (10.6 miles)

  • Lowest 2 September, 2026

    50.7 °F

  • Average September

    67 °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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