Whitewater Lake Weather Forecast

    • 65
    • 83

    Chance Rain Showers

    • 65
    • 81

    Rain Showers

    • 62
    • 82

    Chance Rain Showers

    • 57
    • 77

    Mostly Cloudy

    • 57
    • 74

    Mostly Cloudy

    • 60
    • 75

    Chance Rain Showers

Today 10 Aug Walworth

Partly sunny. Patchy fog in the morning. Slight chance of light Showers early in the afternoon. Chance of light Showers and Thunderstorms late in the afternoon. Highs in the lower 80s. Northeast Winds up to 5 Mph. Chance of precipitation 30 percent.

Tonight 10 Aug Walworth

Mostly cloudy. Chance of light Showers and Thunderstorms after Midnight, then slight chance of light Showers early in the morning. Patchy fog early in the morning. Lows in the mid 60s. Calm Winds. Chance of precipitation 40 percent.

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Whitewater Lake Temperature Statistics

August Temperature

Janesville-Rock County (19.9 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    68.5 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (19.9 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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