Janesville Weather Forecast

    • 66
    • 82

    Rain Showers

    • 61
    • 73

    Rain Showers

    • 60
    • 77

    Partly Sunny

    • 60
    • 79

    Mostly Sunny

    • 63
    • 81

    Mostly Sunny

    • 64
    • 83

    Chance Thunderstorms

    • 62
    • 79

    Chance Rain Showers

Today 30 Jul Bremer

Partly sunny. Patchy smoke. Near steady temperature in the lower 80s. South Winds around 10 Mph.

Tonight 30 Jul Bremer

Mostly cloudy. Patchy smoke this evening. A chance of Showers with a slight chance of Thunderstorms after midnight. Lows in the mid 60s. Southeast Winds 10 to 15 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Janesville Temperature Statistics

July Temperature

Waterloo, Waterloo Municipal Airport (6.8 miles)

  • Lowest 22 July, 2026

    56.6 °F

  • Average July

    76.7 °F

  • Highest 26 July, 2026

    96.7 °F

Climate (2021–2026)

Waterloo, Waterloo Municipal Airport (6.8 miles)

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  • Average Low 2021–2026

    40.1 °F

  • Average 2021–2026

    51.1 °F

  • Average High 2021–2026

    61.9 °F
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