Fairfield Weather Forecast

    • 52
    • 74

    Mostly Sunny

    • 55
    • 78

    Partly Sunny

    • 58
    • 79

    Mostly Sunny

    • 68
    • 84

    Partly Sunny

    • 67
    • 90

    Chance Rain Showers

    • 63
    • 87

    Slight Chance Thunderstorms

Today 22 Jul Walworth

Sunny. Highs in the mid 70s. North Winds 5 to 10 Mph.

Tonight 22 Jul Walworth

Mostly clear. Lows in the lower 50s. Northwest Winds up to 5 Mph.

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Fairfield Temperature Statistics

July Temperature

Janesville-Rock County (13 miles)

  • Lowest 12 July, 2026

    53.6 °F

  • Average July

    74.9 °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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