Fairfield Weather Forecast

    • 46
    • 75

    Rain Showers Likely

    • 38
    • 61

    Partly Sunny

    • 48
    • 67

    Rain Showers Likely

    • 54
    • 78

    Slight Chance Rain Showers

    • 55
    • 82

    Chance Thunderstorms

    • 58
    • 81

    Rain Showers Likely

Today 12 May Walworth

Warmer, breezy. Cloudy until late afternoon then becoming partly sunny. Scattered light rain Showers in the Morning, then chance of light rain Showers and Thunderstorms in the afternoon. Highs in the mid 70s. Southwest Winds 15 to 25 Mph with Gusts to around 40 Mph. Chance of precipitation 50 percent.

Tonight 12 May Walworth

Partly cloudy in the evening then clearing. A 20 percent chance of light rain Showers and Thunderstorms in the evening. Lows in the mid 40s. Northwest Winds 15 to 20 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

    48.2 °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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