Sugar River Forest Preserve Weather Forecast

    • -14
    • -4

    Cold

    • -2
    • 3

    Slight Chance Snow

    • -6
    • 10

    Cold

    • 3
    • 10

    Partly Sunny

    • -2
    • 16

    Partly Sunny

Today 23 Jan Winnebago

Mostly sunny. Scattered Flurries in the morning. Highs around 4 below. Northwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the morning. Wind chill Values as low as 39 below.

Tonight 23 Jan Winnebago

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 13 below. North Winds around 5 Mph.

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Sugar River Forest Preserve Temperature Statistics

January Temperature

Janesville-Rock County (14.3 miles)

  • Lowest 20 January, 2026

    -5.8 °F

  • Average January

    24.4 °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

    48.7 °F

  • Average High 2021–2026

    60.2 °F
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