Fairfield Weather Forecast

    • 40
    • 42

    Chance Rain

    • 13
    • 52

    Rain

    • 7
    • 21

    Blowing Snow

    • 17
    • 24

    Mostly Cloudy

    • 7
    • 27

    Chance Snow

    • 4
    • 16

    Partly Sunny

    • 11
    • 21

    Mostly Cloudy

Today 27 Dec Walworth

Cloudy. Near steady temperature in the lower 40s. Southeast Winds around 10 Mph.

Tonight 27 Dec Walworth

Cloudy. Areas of fog through the night. Chance of drizzle in the late evening and overnight. Lows around 40. Southeast Winds up to 10 Mph. Chance of precipitation 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fairfield Temperature Statistics

December Temperature

Janesville-Rock County (13 miles)

  • Lowest 14 December, 2025

    -7.6 °F

  • Average December

    22 °F

  • Highest 18 December, 2025

    46.4 °F

Climate (2020–Present)

Janesville-Rock County (13 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
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