Fairfield Weather Forecast

    • 70
    • 81

    Chance Rain Showers

    • 61
    • 82

    Slight Chance Thunderstorms

    • 60
    • 79

    Partly Sunny

    • 61
    • 80

    Rain Showers Likely

    • 54
    • 75

    Slight Chance Thunderstorms

    • 55
    • 74

    Mostly Cloudy

    • 57
    • 75

    Partly Sunny

Today 15 Aug Walworth

Partly sunny with isolated light Showers and Thunderstorms. Patchy fog. Southeast Winds around 5 Mph. Chance of precipitation 20 percent.

Tonight 15 Aug Walworth

Mostly cloudy. Chance of Sprinkles in the evening. Chance of Thunderstorms until early morning. Chance of light Showers in the late evening and overnight. Lows around 70. South Winds up to 5 Mph shifting to the southwest after midnight. Chance of precipitation 50 percent.

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Fairfield Temperature Statistics

August Temperature

Janesville-Rock County (13 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    69.7 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (13 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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