Fairfield Weather Forecast

    • 61
    • 82

    Decreasing Clouds

    • 61
    • 84

    Mostly Sunny

    • 63
    • 86

    Mostly Sunny

    • 66
    • 88

    Mostly Sunny

    • 68
    • 89

    Mostly Sunny

    • 66
    • 89

    Mostly Sunny

Today 10 Jul Walworth

Partly sunny. Patchy fog in the morning. Highs in the lower 80s. Northeast Winds 5 to 10 Mph.

Tonight 10 Jul Walworth

Mostly cloudy through around midnight then clearing. Lows in the lower 60s. East 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 7 July, 2026

    55.4 °F

  • Average July

    72.7 °F

  • Highest 1 July, 2026

    91.4 °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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