Fairfield Weather Forecast

    • 65
    • 80

    Rain Showers Likely

    • 44
    • 74

    Rain Showers Likely

    • 39
    • 62

    Partly Sunny

    • 44
    • 62

    Chance Rain Showers

    • 48
    • 67

    Slight Chance Rain Showers

    • 52
    • 74

    Partly Sunny

Today 18 May Walworth

Partly sunny. Near steady temperature in the upper 70s. Southwest Winds 10 to 15 Mph.

Tonight 18 May Walworth

Cloudy with a 50 percent chance of light Showers and Thunderstorms. Lows in the mid 60s. South Winds 10 to 15 Mph with Gusts to around 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfield Temperature Statistics

May Temperature

Janesville-Rock County (13 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    51.1 °F

  • Highest 16 May, 2026

    82.4 °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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