Hart Lake Weather Forecast

    • 42
    • 65

    Becoming Sunny

    • 48
    • 65

    Chance Rain Showers

    • 49
    • 67

    Mostly Cloudy

    • 51
    • 68

    Chance Rain Showers

    • 48
    • 68

    Mostly Cloudy

    • 46
    • 70

    Partly Sunny

Today 15 Sep Mahnomen

Mostly sunny. Highs in the mid 60s. West Winds 10 to 20 Mph.

Tonight 15 Sep Mahnomen

Mostly clear. Lows 40 to 45. Northwest Winds around 5 Mph shifting to the east after midnight.

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Hart Lake Temperature Statistics

September Temperature

Mahnomen County Airport (10.6 miles)

  • Lowest 13 September, 2026

    37 °F

  • Average September

    65.7 °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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