Whitewater Weather Forecast

    • 44
    • 68

    Partly Sunny

    • 49
    • 70

    Partly Sunny

    • 50
    • 71

    Mostly Sunny

    • 57
    • 72

    Rain Showers Likely

    • 57
    • 68

    Rain Showers Likely

    • 53
    • 68

    Chance Rain Showers

Today 26 Sep Walworth

Mostly sunny. Highs in the mid 60s. East Winds around 5 Mph.

Tonight 26 Sep Walworth

Partly cloudy until early morning then becoming mostly cloudy. Lows in the upper 40s. East Winds up to 5 Mph through around midnight becoming calm.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Whitewater Temperature Statistics

September Temperature

Janesville-Rock County (21.1 miles)

  • Lowest 14 September, 2026

    42.8 °F

  • Average September

    65.1 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (21.1 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.2 °F
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