Fairfield Weather Forecast

    • 69
    • 89

    Isolated Thunderstorms

    • 71
    • 91

    Chance Rain Showers

    • 61
    • 88

    Slight Chance Thunderstorms

    • 62
    • 83

    Chance Rain Showers

    • 65
    • 85

    Chance Rain Showers

    • 58
    • 82

    Partly Sunny

Today 16 Jul Walworth

Warm and humid. Partly sunny. Smoke in the Morning, then Areas of smoke in the late morning and afternoon. Highs in the upper 80s. East Winds up to 10 Mph. Highest heat index Readings 95 to 96 late in the afternoon.

Tonight 16 Jul Walworth

Partly cloudy. Areas of smoke. Lows in the upper 60s. Southeast Winds up to 10 Mph.

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Fairfield Temperature Statistics

July Temperature

Janesville-Rock County (13 miles)

  • Lowest 12 July, 2026

    53.6 °F

  • Average July

    73 °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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