Wayside Park Weather Forecast

    • 61
    • 69

    Mostly Cloudy

    • 59
    • 75

    Chance Rain Showers

    • 61
    • 73

    Rain Showers

    • 59
    • 74

    Rain Showers Likely

    • 57
    • 68

    Chance Rain Showers

    • 56
    • 68

    Slight Chance Rain Showers

Today 16 Sep Jefferson

Mostly cloudy. Slight chance of Sprinkles in the afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph.

Tonight 16 Sep Jefferson

Mostly cloudy. A 40 percent chance of light Showers in the late evening and overnight. Lows in the lower 60s. East Winds up to 10 Mph.

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  • Temperature Real-Time

Wayside Park Temperature Statistics

September Temperature

Janesville-Rock County (18 miles)

  • Lowest 13 September, 2026

    50 °F

  • Average September

    69.2 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (18 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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