Olsons Bay Weather Forecast

    • 27
    • 49

    Mostly Sunny

    • 32
    • 48

    Partly Sunny

    • 34
    • 51

    Partly Sunny

    • 38
    • 57

    Mostly Cloudy

    • 43
    • 54

    Mostly Cloudy

Today 13 Feb Jefferson

Sunny. Highs in the upper 40s. Southwest Winds up to 10 Mph.

Tonight 13 Feb Jefferson

Mostly clear. Patchy fog after midnight. Lows in the upper 20s. Southwest Winds up to 5 Mph through around midnight becoming calm.

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Olsons Bay Temperature Statistics

February Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 4 February, 2026

    -4 °F

  • Average February

    21.9 °F

  • Highest 10 February, 2026

    41 °F

Climate (2021–Present)

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

    60.2 °F
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