Fairgrounds Weather Forecast

    • 54
    • 73

    Mostly Cloudy

    • 55
    • 66

    Rain Showers

    • 55
    • 65

    Rain Showers Likely

    • 54
    • 70

    Chance Thunderstorms

    • 54
    • 73

    Slight Chance Thunderstorms

    • 50
    • 72

    Partly Sunny

    • 50
    • 70

    Mostly Sunny

Today 17 Sep Pennington

Mostly cloudy. Highs in the mid 70s. North Winds around 5 Mph.

Tonight 17 Sep Pennington

Mostly cloudy. Lows in the mid 50s. Northeast Winds 5 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairgrounds Temperature Statistics

September Temperature

Thief River Falls, Thief River Falls Regional Airport (3.7 miles)

  • Lowest 7 September, 2025

    35.1 °F

  • Average September

    59.6 °F

  • Highest 14 September, 2025

    81 °F

Climate (2020–Present)

Thief River Falls, Thief River Falls Regional Airport (3.7 miles)

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  • Average Low 2020–2025

    32.1 °F

  • Average 2020–2025

    41.3 °F

  • Average High 2020–2025

    50.1 °F
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