Fairfield Weather Forecast

    • 46
    • 75

    Mostly Sunny

    • 57
    • 84

    Partly Sunny

    • 52
    • 73

    Partly Sunny

    • 52
    • 79

    Partly Sunny

    • 52
    • 82

    Mostly Sunny

    • 51
    • 79

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

Today 28 May Walworth

Cooler, sunny. Highs in the lower 70s. Northeast Winds 10 to 15 Mph.

Tonight 28 May Walworth

Clear through around midnight then becoming partly cloudy. Lows in the mid 40s. East Winds up to 10 Mph.

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Fairfield Temperature Statistics

May Temperature

Janesville-Rock County (13 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    55.5 °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

    48.7 °F

  • Average High 2021–2026

    60.4 °F
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