Fairfield Weather Forecast

    • 27
    • 40

    Decreasing Clouds

    • 27
    • 48

    Mostly Sunny

    • 31
    • 51

    Partly Sunny

    • 30
    • 50

    Partly Sunny

    • 37
    • 53

    Mostly Cloudy

    • 41
    • 54

    Chance Rain

Today 12 Feb Walworth

Mostly cloudy until late afternoon then clearing. Highs in the upper 30s. Southeast Winds up to 5 Mph.

Tonight 12 Feb Walworth

Partly cloudy. Lows in the upper 20s. South Winds up to 5 Mph.

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Fairfield Temperature Statistics

February Temperature

Janesville-Rock County (13 miles)

  • Lowest 4 February, 2026

    -4 °F

  • Average February

    21.2 °F

  • Highest 10 February, 2026

    41 °F

Climate (2021–Present)

Janesville-Rock County (13 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.6 °F

  • Average High 2021–2026

    60.2 °F
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