Whitewater Lake Weather Forecast

    • 46
    • 75

    Rain Showers Likely

    • 38
    • 62

    Partly Sunny

    • 47
    • 67

    Chance Rain Showers

    • 54
    • 78

    Chance Rain Showers

    • 55
    • 82

    Chance Rain Showers

    • 58
    • 81

    Rain Showers Likely

Today 12 May Walworth

Warmer. Mostly cloudy. Chance of light rain Showers in the morning. Light rain Showers likely early in the Afternoon, then chance of light rain Showers and slight chance of Thunderstorms late in the afternoon. Highs in the lower 70s. Southwest Winds 10 to 20 Mph with Gusts to around 35 Mph. Chance of precipitation 60 percent.

Tonight 12 May Walworth

Mostly clear after midnight then becoming mostly cloudy. Areas of frost after midnight. Lows in the upper 30s. Southeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Whitewater Lake Temperature Statistics

May Temperature

Janesville-Rock County (19.9 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    48.3 °F

  • Highest 4 May, 2026

    80.6 °F

Climate (2021–Present)

Janesville-Rock County (19.9 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.4 °F
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