Olsons Bay Weather Forecast

    • 55
    • 74

    Increasing Clouds

    • 52
    • 70

    Rain Showers Likely

    • 57
    • 71

    Rain Showers

    • 53
    • 72

    Slight Chance Thunderstorms

    • 55
    • 75

    Mostly Sunny

    • 57
    • 78

    Chance Rain Showers

Today 15 Jun Jefferson

Sunny until late afternoon then becoming partly sunny. Highs in the mid 70s. West Winds 5 to 10 Mph.

Tonight 15 Jun Jefferson

Partly cloudy. Chance of rain Showers and slight chance of Thunderstorms early in the morning. Lows in the mid 50s. Southwest Winds 5 to 10 Mph. Chance of precipitation 30 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Olsons Bay Temperature Statistics

June Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 3 June, 2026

    44.6 °F

  • Average June

    67.9 °F

  • Highest 4 June, 2026

    87.8 °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

    60.4 °F
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