Sugar River Forest Preserve Weather Forecast

    • 5
    • 15

    Partly Sunny

    • 2
    • 21

    Mostly Sunny

    • 17
    • 25

    Mostly Cloudy

    • 15
    • 26

    Mostly Cloudy

    • 18
    • 28

    Mostly Cloudy

    • 14
    • 27

    Chance Snow

Today 30 Jan Winnebago

Mostly cloudy. Scattered snow Showers in the afternoon. Snow accumulation up to half an inch. Highs around 15. North Winds 10 to 15 Mph. Chance of precipitation 50 percent. Wind chill Values as low as 13 below in the morning.

Tonight 30 Jan Winnebago

Partly cloudy. Lows around 5 above. North Winds 10 to 15 Mph. Wind chill Values as low as 10 below.

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Sugar River Forest Preserve Temperature Statistics

January Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 23 January, 2026

    -16.6 °F

  • Average January

    19.2 °F

  • Highest 8 January, 2026

    55.4 °F

Climate (2021–Present)

Janesville-Rock County (14.3 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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