Big Hill Park Weather Forecast

    • 57
    • 80

    Decreasing Clouds

    • 52
    • 77

    Mostly Sunny

    • 61
    • 78

    Mostly Sunny

    • 56
    • 80

    Slight Chance Rain Showers

    • 62
    • 77

    Chance Rain Showers

    • 62
    • 83

    Rain Showers Likely

Today 9 Sep Rock

Mostly cloudy. A 30 percent chance of light Showers late in the morning. Highs in the lower 80s. West Winds 5 to 10 Mph.

Tonight 9 Sep Rock

Cooler. Partly cloudy. Lows in the upper 50s. Northwest Winds up to 5 Mph.

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  • Temperature Real-Time

Big Hill Park Temperature Statistics

September Temperature

Janesville-Rock County (4.3 miles)

  • Lowest 7 September, 2026

    55.4 °F

  • Average September

    72.9 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (4.3 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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