Clover Valley Fen State Natural Area Weather Forecast

    • 69
    • 89

    Chance Thunderstorms

    • 62
    • 84

    Mostly Cloudy

    • 60
    • 81

    Partly Sunny

    • 63
    • 81

    Mostly Cloudy

    • 70
    • 83

    Chance Rain Showers

    • 65
    • 86

    Chance Rain Showers

Today 4 Sep Walworth

Warm and humid. Partly sunny. Slight chance of light Showers in the morning. Slight chance of light Showers and Thunderstorms late in the afternoon. Highs in the upper 80s. South Winds up to 10 Mph shifting to the southwest in the afternoon. Chance of precipitation 20 percent. Highest heat index Readings 96 to 101 in the afternoon.

Tonight 4 Sep Walworth

Partly cloudy after midnight then becoming mostly cloudy. A 50 percent chance of light Showers and Thunderstorms. Near steady temperature in the lower 70s. South Winds up to 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Clover Valley Fen State Natural Area Temperature Statistics

September Temperature

Janesville-Rock County (20.5 miles)

  • Lowest 1 September, 2026

    69.8 °F

  • Average September

    77.4 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (20.5 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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