Fairfield Weather Forecast

    • 66
    • 82

    Rain Showers Likely

    • 65
    • 82

    Rain Showers Likely

    • 65
    • 81

    Rain Showers Likely

    • 62
    • 81

    Slight Chance Thunderstorms

    • 57
    • 77

    Mostly Cloudy

    • 57
    • 73

    Chance Rain Showers

    • 60
    • 75

    Chance Rain Showers

Today 9 Aug Walworth

Mostly cloudy with a 40 percent chance of light Showers and Thunderstorms. South Winds 5 to 10 Mph.

Tonight 9 Aug Walworth

Mostly cloudy. Chance of light Showers and Thunderstorms until early Morning, then slight chance of light Showers early in the morning. Patchy fog after midnight. Lows in the mid 60s. Southeast Winds up to 5 Mph shifting to the north after midnight. Chance of precipitation 50 percent.

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  • Temperature Forecast NOAA

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Fairfield Temperature Statistics

August Temperature

Janesville-Rock County (13 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    68.5 °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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