Olsons Bay Weather Forecast

    • 31
    • 42

    Increasing Clouds

    • 43
    • 66

    Rain Showers

    • 39
    • 59

    Rain Showers Likely

    • 35
    • 57

    Partly Sunny

    • 47
    • 60

    Mostly Cloudy

    • 60
    • 72

    Rain Showers Likely

Today 7 Apr Jefferson

Mostly sunny. Near steady temperature around 40. Southeast Winds 5 to 10 Mph.

Tonight 7 Apr Jefferson

Mostly cloudy. Chance of snow Showers, possibly mixed with freezing rain and rain Showers after midnight. Light rain Showers likely early in the morning. No snow accumulation. Lows in the upper 20s. Southeast Winds 5 to 15 Mph. Chance of precipitation 60 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olsons Bay Temperature Statistics

April Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 1 April, 2026

    33.8 °F

  • Average April

    41.6 °F

  • Highest 2 April, 2026

    66.2 °F

Climate (2021–Present)

Janesville-Rock County (17.4 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.4 °F
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