Thief River Falls Weather Forecast

    • 50
    • 76

    Mostly Sunny

    • 53
    • 77

    Mostly Sunny

    • 59
    • 77

    Chance Thunderstorms

    • 60
    • 80

    Mostly Cloudy

    • 60
    • 80

    Mostly Cloudy

    • 59
    • 78

    Slight Chance Rain Showers

    • 58
    • 79

    Partly Sunny

Today 9 Sep Pennington

Sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 9 Sep Pennington

Mostly clear. Patchy fog after midnight. Lows 45 to 50. East Winds up to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Thief River Falls Temperature Statistics

September Temperature

Thief River Falls, Thief River Falls Regional Airport (3.1 miles)

  • Lowest 7 September, 2025

    35.1 °F

  • Average September

    52.4 °F

  • Highest 1 September, 2025

    77 °F

Climate (2020–Present)

Thief River Falls, Thief River Falls Regional Airport (3.1 miles)

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  • Average Low 2020–2025

    32 °F

  • Average 2020–2025

    41.2 °F

  • Average High 2020–2025

    50 °F
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