Fairfield Weather Forecast

    • 58
    • 80

    Rain Showers Likely

    • 52
    • 76

    Mostly Sunny

    • 60
    • 78

    Chance Rain Showers

    • 57
    • 80

    Slight Chance Rain Showers

    • 56
    • 75

    Chance Rain Showers

    • 60
    • 77

    Chance Rain Showers

Today 9 Sep Walworth

Cloudy with Showers likely and slight chance of Thunderstorms in the Morning, then cloudy with chance of light Showers late in the morning. Partly sunny in the afternoon. Highs around 80. West Winds 5 to 10 Mph. Chance of precipitation 70 percent.

Tonight 9 Sep Walworth

Mostly clear. Lows in the upper 50s. Northwest Winds up to 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfield Temperature Statistics

September Temperature

Janesville-Rock County (13 miles)

  • Lowest 6 September, 2026

    57.2 °F

  • Average September

    74.4 °F

  • Highest 1 September, 2026

    91.4 °F

Climate (2021–2026)

Janesville-Rock County (13 miles)

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

  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
Get WillyWeather+ to remove ads