Beloit Weather Forecast

    • 58
    • 73

    Chance Rain Showers

    • 55
    • 71

    Chance Rain Showers

    • 56
    • 75

    Slight Chance Thunderstorms

    • 59
    • 79

    Chance Rain Showers

    • 53
    • 79

    Partly Sunny

    • 53
    • 72

    Mostly Sunny

Today 18 Sep Lyon

Mostly cloudy. Patchy fog this morning. A chance of Showers with a slight chance of Thunderstorms this afternoon. Highs in the lower 70s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Sep Lyon

A slight chance of Thunderstorms in the evening. Mostly cloudy with a chance of Showers. Lows in the upper 50s. South Winds 5 to 10 Mph. Chance of rain 40 percent.

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Beloit Temperature Statistics

September Temperature

Sioux Falls, Foss Field (21.7 miles)

  • Lowest 7 September, 2025

    36 °F

  • Average September

    66.2 °F

  • Highest 16 September, 2025

    91 °F

Climate (2020–Present)

Sioux Falls, Foss Field (21.7 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    49.8 °F

  • Average High 2020–2025

    60.6 °F
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