Hononegah Forest Preserve Weather Forecast

    • 56
    • 84

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

    • 60
    • 84

    Partly Sunny

    • 60
    • 79

    Chance Rain Showers

    • 60
    • 76

    Chance Rain Showers

    • 61
    • 78

    Chance Rain Showers

Today 16 Sep Winnebago

Mostly sunny through mid Morning, then becoming sunny. Patchy fog early in the morning. Highs in the mid 80s. East Winds around 5 Mph.

Tonight 16 Sep Winnebago

Mostly clear. Lows in the upper 50s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Hononegah Forest Preserve Temperature Statistics

September Temperature

Janesville-Rock County (12.4 miles)

  • Lowest 7 September, 2025

    39.2 °F
  • Average September

    58.5 °F
  • Highest 14 September, 2025

    84.2 °F

Climate (2020–Present)

Janesville-Rock County (12.4 miles)

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  • Average Low 2020–2025

    40.4 °F
  • Average 2020–2025

    48.7 °F
  • Average High 2020–2025

    60.2 °F
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