Olsons Bay Weather Forecast

    • 48
    • 65

    Mostly Sunny

    • 54
    • 71

    Mostly Sunny

    • 47
    • 72

    Mostly Sunny

    • 47
    • 66

    Partly Sunny

    • 47
    • 66

    Partly Sunny

    • 55
    • 70

    Mostly Sunny

Today 5 Oct Jefferson

Sunny. Highs in the mid 60s. Northeast Winds up to 5 Mph in the morning becoming calm.

Tonight 5 Oct Jefferson

Mostly clear. Lows in the mid 40s. Southeast Winds up to 10 Mph.

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Olsons Bay Temperature Statistics

October Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 2 October, 2026

    41 °F

  • Average October

    56.7 °F

  • Highest 1 October, 2026

    64.4 °F

Climate (2021–2026)

Janesville-Rock County (17.4 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    60.1 °F
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