Fairfield Weather Forecast

    • 56
    • 79

    Mostly Sunny

    • 59
    • 81

    Partly Sunny

    • 66
    • 79

    Mostly Cloudy

    • 71
    • 85

    Chance Thunderstorms

    • 71
    • 86

    Chance Thunderstorms

    • 69
    • 86

    Chance Rain Showers

    • 67
    • 86

    Chance Rain Showers

Today 27 Aug Walworth

Mostly sunny. Northwest Winds around 5 Mph.

Tonight 27 Aug Walworth

Partly cloudy. Lows in the upper 50s. Northeast Winds up to 5 Mph through around midnight becoming calm.

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Fairfield Temperature Statistics

August Temperature

Janesville-Rock County (13 miles)

  • Lowest 24 August, 2026

    50 °F

  • Average August

    67.9 °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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