Janesville Weather Forecast

    • 47
    • 54

    Rain Showers

    • 49
    • 61

    Rain Showers

    • 52
    • 65

    Mostly Cloudy

    • 55
    • 66

    Rain Showers

    • 48
    • 66

    Rain Showers

    • 45
    • 60

    Chance Rain Showers

Today 30 Oct Bremer

Mostly cloudy with a 40 percent chance of Showers. Highs in the lower 50s. East Winds 5 to 10 Mph.

Tonight 30 Oct Bremer

Cloudy. A chance of Showers in the Evening, then Showers with a slight chance of Thunderstorms after midnight. Lows in the upper 40s. East Winds 5 to 10 Mph. Chance of rain 80 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Janesville Temperature Statistics

October Temperature

Waterloo, Waterloo Municipal Airport (6.8 miles)

  • Lowest 17 October, 2026

    30.7 °F

  • Average October

    59.8 °F

  • Highest 11 October, 2026

    89.7 °F

Climate (2021–2026)

Waterloo, Waterloo Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    40.2 °F

  • Average 2021–2026

    51.2 °F

  • Average High 2021–2026

    61.9 °F
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