Fairfield Weather Forecast

    • 65
    • 81

    Slight Chance Thunderstorms

    • 63
    • 77

    Rain Showers Likely

    • 64
    • 78

    Rain Showers Likely

    • 68
    • 81

    Rain Showers Likely

    • 61
    • 80

    Slight Chance Rain Showers

    • 58
    • 76

    Partly Sunny

    • 61
    • 77

    Mostly Cloudy

Today 12 Aug Walworth

Partly sunny. North Winds around 5 Mph.

Tonight 12 Aug Walworth

Partly cloudy until early morning then becoming mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. Northeast Winds up to 5 Mph through around midnight becoming calm.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfield Temperature Statistics

August Temperature

Janesville-Rock County (13 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    69 °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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