Fairfield Weather Forecast

    • 42
    • 67

    Gradual Clearing

    • 49
    • 65

    Mostly Cloudy

    • 47
    • 69

    Rain Showers

    • 42
    • 60

    Mostly Cloudy

    • 38
    • 58

    Partly Sunny

    • 37
    • 57

    Mostly Cloudy

Today 25 Apr Walworth

Mostly cloudy in the morning then clearing. Chance of Sprinkles in the morning. Highs in the mid 60s. Northeast Winds 5 to 15 Mph.

Tonight 25 Apr Walworth

Partly cloudy until early morning then becoming mostly cloudy. Lows in the lower 40s. East Winds 5 to 10 Mph.

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Fairfield Temperature Statistics

April Temperature

Janesville-Rock County (13 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    47.9 °F

  • Highest 17 April, 2026

    78.8 °F

Climate (2021–Present)

Janesville-Rock County (13 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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