Olsons Bay Weather Forecast

    • 4
    • 14

    Mostly Cloudy

    • 1
    • 20

    Mostly Sunny

    • 16
    • 25

    Chance Snow Showers

    • 13
    • 26

    Mostly Cloudy

    • 17
    • 27

    Chance Snow Showers

    • 12
    • 27

    Mostly Cloudy

Today 30 Jan Jefferson

Partly sunny. Scattered snow Showers in the afternoon. Highs around 14. North Winds 5 to 15 Mph. Chance of snow 50 percent.

Tonight 30 Jan Jefferson

Partly cloudy in the evening then becoming mostly cloudy. Chance of Flurries late in the evening. Chance of snow Showers after midnight. Near steady temperature around 7. Northwest Winds 5 to 10 Mph. Chance of snow 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Olsons Bay Temperature Statistics

January Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 23 January, 2026

    -16.6 °F

  • Average January

    18.6 °F

  • Highest 8 January, 2026

    55.4 °F

Climate (2021–Present)

Janesville-Rock County (17.4 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    60.2 °F
Get WillyWeather+ to remove ads