Perch Lake Weather Forecast

    • 61
    • 86

    Slight Chance Thunderstorms

    • 59
    • 83

    Chance Thunderstorms

    • 58
    • 77

    Chance Thunderstorms

    • 58
    • 78

    Chance Rain Showers

    • 58
    • 78

    Chance Thunderstorms

    • 55
    • 78

    Chance Rain Showers

    • 52
    • 75

    Partly Sunny

Today 17 Sep Monroe

Mostly sunny. Near steady temperature in the lower 80s. Southwest Winds around 5 Mph.

Tonight 17 Sep Monroe

Partly cloudy this Evening, then becoming mostly cloudy. A slight chance of Showers and Thunderstorms. Lows in the lower 60s. Light Winds. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Perch Lake Temperature Statistics

September Temperature

Sparta, Sparta / Fort McCoy Airport (3.1 miles)

  • Lowest 7 September, 2025

    32.9 °F

  • Average September

    60.6 °F

  • Highest 13 September, 2025

    85.5 °F

Climate (2020–Present)

Sparta, Sparta / Fort McCoy Airport (3.1 miles)

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  • Average Low 2020–2025

    34.5 °F

  • Average 2020–2025

    47.2 °F

  • Average High 2020–2025

    57.9 °F
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