Whitewater Lake Weather Forecast

    • 71
    • 89

    Rain Showers Likely

    • 71
    • 90

    Chance Thunderstorms

    • 62
    • 82

    Chance Thunderstorms

    • 61
    • 83

    Mostly Sunny

    • 63
    • 84

    Chance Rain Showers

    • 61
    • 83

    Chance Rain Showers

Today 4 Jul Walworth

Warm and humid. Mostly cloudy with Showers likely and chance of Thunderstorms in the Morning, then partly sunny with chance of light Showers and Thunderstorms late in the morning. Mostly sunny in the afternoon. Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of precipitation 70 percent. Highest heat index Readings 95 to 97 in the afternoon.

Tonight 4 Jul Walworth

Mostly cloudy with a 50 percent chance of light Showers and Thunderstorms. Near steady temperature around 70. Southeast Winds 5 to 10 Mph.

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Whitewater Lake Temperature Statistics

July Temperature

Janesville-Rock County (19.9 miles)

  • Lowest 1 July, 2025

    60.8 °F

  • Average July

    70 °F

  • Highest 1 July, 2025

    84.2 °F

Climate (2020–Present)

Janesville-Rock County (19.9 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.3 °F
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