Olsons Bay Weather Forecast

    • 69
    • 92

    Sunny

    • 71
    • 95

    Mostly Sunny

    • 70
    • 94

    Mostly Sunny

    • 68
    • 90

    Partly Sunny

    • 68
    • 89

    Slight Chance Thunderstorms

    • 66
    • 88

    Slight Chance Thunderstorms

Today 13 Jul Jefferson

Very warm. Sunny. Highs in the lower 90s. West Winds up to 10 Mph.

Tonight 13 Jul Jefferson

Clear. Near steady temperature in the mid 60s. Southwest Winds up to 5 Mph.

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Olsons Bay Temperature Statistics

July Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 7 July, 2026

    55.4 °F

  • Average July

    73 °F

  • Highest 1 July, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (17.4 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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