Olsons Bay Weather Forecast

    • 51
    • 68

    Rain Showers Likely

    • 39
    • 77

    Rain Showers

    • 31
    • 48

    Chance Rain Showers

    • 29
    • 48

    Partly Sunny

    • 46
    • 58

    Mostly Sunny

    • 46
    • 70

    Partly Sunny

Today 16 Apr Jefferson

Patchy fog in the morning. Cloudy with chance of light rain Showers and slight chance of Thunderstorms in the Morning, then partly sunny with chance of light rain Showers in the late morning and early afternoon. Sunny late in the afternoon. Highs in the upper 60s. North Winds up to 10 Mph. Chance of precipitation 50 percent.

Tonight 16 Apr Jefferson

Rain Showers and chance of Thunderstorms. Patchy fog. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the upper 50s. Southeast Winds up to 5 Mph. Chance of precipitation 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olsons Bay Temperature Statistics

April Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    45.8 °F

  • Highest 12 April, 2026

    75.2 °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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