Fairfield Weather Forecast

    • 68
    • 91

    Sunny

    • 69
    • 94

    Mostly Sunny

    • 68
    • 93

    Mostly Sunny

    • 68
    • 91

    Partly Sunny

    • 70
    • 90

    Chance Rain Showers

Today 13 Jul Walworth

Very warm. Sunny. Highs in the lower 90s. West Winds up to 10 Mph.

Tonight 13 Jul Walworth

Clear. Lows in the upper 60s. West Winds up to 5 Mph. Highest heat index Readings 95 to 96 in the evening.

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Fairfield Temperature Statistics

July Temperature

Janesville-Rock County (13 miles)

  • Lowest 7 July, 2026

    55.4 °F

  • Average July

    73 °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

    60.4 °F
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