Fairfield Weather Forecast

    • 70
    • 81

    Chance Rain Showers

    • 71
    • 86

    Slight Chance Thunderstorms

    • 70
    • 89

    Slight Chance Thunderstorms

    • 69
    • 90

    Chance Rain Showers

    • 66
    • 85

    Chance Rain Showers

    • 64
    • 84

    Partly Sunny

Today 30 Aug Walworth

Numerous light Showers and Thunderstorms. Southwest Winds 10 to 15 Mph. Chance of precipitation 60 percent.

Tonight 30 Aug Walworth

Mostly cloudy with a 50 percent chance of light Showers and Thunderstorms. Near steady temperature in the lower 70s. South Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfield Temperature Statistics

August Temperature

Janesville-Rock County (13 miles)

  • Lowest 24 August, 2026

    50 °F

  • Average August

    67.7 °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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