Fairfield Weather Forecast

    • 67
    • 81

    Gradual Clearing

    • 72
    • 91

    Chance Rain Showers

    • 67
    • 91

    Chance Rain Showers

    • 61
    • 86

    Mostly Sunny

    • 62
    • 86

    Mostly Sunny

    • 64
    • 86

    Slight Chance Thunderstorms

Today 25 Jul Walworth

Mostly cloudy. Highs around 80. Southwest Winds 5 to 10 Mph.

Tonight 25 Jul Walworth

Warmer. Partly cloudy. Lows in the upper 60s. Southwest Winds up to 5 Mph.

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Fairfield Temperature Statistics

July Temperature

Janesville-Rock County (13 miles)

  • Lowest 22 July, 2026

    50 °F

  • Average July

    74.3 °F

  • Highest 14 July, 2026

    95 °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

    60.4 °F
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