Hart Lake Weather Forecast

    • 56
    • 79

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 63
    • 82

    Mostly Sunny

    • 55
    • 82

    Rain Showers

    • 49
    • 70

    Mostly Sunny

    • 55
    • 73

    Mostly Sunny

    • 60
    • 79

    Slight Chance Thunderstorms

Today 31 Jul Mahnomen

Mostly sunny. Near steady temperature in the upper 70s. North Winds around 15 Mph.

Tonight 31 Jul Mahnomen

Mostly clear. Lows in the mid 50s. North Winds up to 10 Mph.

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  • Temperature Real-Time

Hart Lake Temperature Statistics

July Temperature

Mahnomen County Airport (10.6 miles)

  • Lowest 22 July, 2026

    44.6 °F

  • Average July

    73.1 °F

  • Highest 29 July, 2026

    90.5 °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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