Fairfield Weather Forecast

    • 58
    • 83

    Becoming Sunny

    • 60
    • 82

    Mostly Sunny

    • 64
    • 85

    Partly Sunny

    • 63
    • 82

    Chance Rain Showers

    • 61
    • 79

    Chance Thunderstorms

    • 59
    • 81

    Mostly Sunny

Today 28 Jul Walworth

Sunny. Highs in the lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 28 Jul Walworth

Clear. Lows in the upper 50s. Northeast Winds up to 5 Mph through around midnight becoming calm.

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Fairfield Temperature Statistics

July Temperature

Janesville-Rock County (13 miles)

  • Lowest 22 July, 2026

    50 °F

  • Average July

    74.5 °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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