Olsons Bay Weather Forecast

    • 17
    • 25

    Mostly Cloudy

    • 17
    • 39

    Chance Snow

    • 15
    • 29

    Chance Snow

    • 22
    • 36

    Partly Sunny

    • 25
    • 51

    Partly Sunny

    • 16
    • 38

    Slight Chance Snow

Today 23 Feb Jefferson

Partly sunny. Highs in the mid 20s. North Winds 5 to 15 Mph.

Tonight 23 Feb Jefferson

Partly cloudy in the evening then becoming mostly cloudy. Lows around 17. Calm Winds becoming south up to 10 Mph after midnight.

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Olsons Bay Temperature Statistics

February Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 4 February, 2026

    -4 °F

  • Average February

    28.6 °F

  • Highest 16 February, 2026

    64.4 °F

Climate (2021–Present)

Janesville-Rock County (17.4 miles)

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  • Average Low 2021–2026

    40.5 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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