Fairfield Weather Forecast

    • 59
    • 76

    Areas Smoke

    • 62
    • 81

    Areas Smoke

    • 71
    • 85

    Partly Sunny

    • 72
    • 91

    Mostly Sunny

    • 70
    • 91

    Chance Thunderstorms

    • 67
    • 87

    Chance Thunderstorms

    • 66
    • 85

    Chance Thunderstorms

Today 20 Jul Walworth

Partly sunny. Areas of smoke. Northeast Winds 5 to 10 Mph.

Tonight 20 Jul Walworth

Partly cloudy. Areas of smoke. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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Fairfield Temperature Statistics

July Temperature

Janesville-Rock County (13 miles)

  • Lowest 18 July, 2025

    50 °F

  • Average July

    70.5 °F

  • Highest 3 July, 2025

    89.6 °F

Climate (2020–Present)

Janesville-Rock County (13 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.3 °F
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