Olsons Bay Weather Forecast

    • 35
    • 51

    Mostly Cloudy

    • 47
    • 64

    Mostly Cloudy

    • 27
    • 67

    Slight Chance Rain

    • 24
    • 43

    Mostly Sunny

    • 34
    • 52

    Partly Sunny

Today 24 Mar Jefferson

Partly sunny. Highs in the lower 50s. Southwest Winds 5 to 10 Mph.

Tonight 24 Mar Jefferson

Mostly cloudy. Chance of Flurries through the night. Near steady temperature around 30. South Winds 5 to 10 Mph.

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Olsons Bay Temperature Statistics

March Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 1 March, 2026

    10.4 °F

  • Average March

    38 °F

  • Highest 21 March, 2026

    77 °F

Climate (2021–Present)

Janesville-Rock County (17.4 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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