Fairfield Weather Forecast

    • 53
    • 78

    Mostly Cloudy

    • 50
    • 77

    Mostly Cloudy

    • 50
    • 77

    Mostly Sunny

    • 56
    • 83

    Partly Sunny

    • 63
    • 87

    Mostly Cloudy

    • 63
    • 86

    Chance Thunderstorms

    • 63
    • 85

    Chance Rain Showers

Today 31 May Walworth

Partly sunny. Near steady temperature in the mid 70s. East Winds 5 to 10 Mph.

Tonight 31 May Walworth

Mostly cloudy. Lows in the lower 50s. East Winds up to 5 Mph.

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Fairfield Temperature Statistics

May Temperature

Janesville-Rock County (13 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    56.4 °F

  • Highest 26 May, 2026

    87.8 °F

Climate (2021–Present)

Janesville-Rock County (13 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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