Fairfield Weather Forecast

    • 58
    • 79

    Thunderstorms

    • 56
    • 83

    Chance Rain Showers

    • 64
    • 84

    Chance Thunderstorms

    • 64
    • 84

    Rain Showers Likely

    • 50
    • 81

    Rain Showers Likely

    • 44
    • 66

    Partly Sunny

Today 15 May Walworth

Sunny. Highs in the mid 70s. South Winds 10 to 20 Mph.

Tonight 15 May Walworth

Clear then becoming partly cloudy late in the evening then becoming cloudy. Slight chance of light rain Showers and Thunderstorms late in the evening. Rain Showers with Thunderstorms likely after Midnight, then chance of light rain Showers and slight chance of Thunderstorms early in the morning. Lows in the mid 50s. South Winds 5 to 15 Mph. Chance of precipitation 80 percent.

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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

    48.8 °F

  • Highest 4 May, 2026

    80.6 °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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