Olsons Bay Weather Forecast

    • 22
    • 35

    Rain/Snow

    • 21
    • 33

    Chance Snow

    • 16
    • 28

    Mostly Cloudy

    • 15
    • 28

    Partly Sunny

    • 27
    • 38

    Mostly Cloudy

    • 20
    • 40

    Chance Snow

Today 20 Feb Jefferson

Colder, Breezy, cloudy. Light snow likely late in the Morning, then chance of light snow early in the afternoon. Little new snow accumulation. Near steady temperature in the lower 30s. West Winds 15 to 25 Mph. Chance of snow 70 percent.

Tonight 20 Feb Jefferson

Mostly cloudy through around midnight then becoming partly cloudy. Lows in the mid 20s. Northwest Winds 10 to 15 Mph.

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Olsons Bay Temperature Statistics

February Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 4 February, 2026

    -4 °F

  • Average February

    28.1 °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

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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