Sugar River Forest Preserve Weather Forecast

    • 32
    • 51

    Partly Sunny

    • 41
    • 56

    Partly Sunny

    • 45
    • 65

    Chance Rain Showers

    • 46
    • 73

    Chance Rain Showers

    • 41
    • 62

    Chance Rain Showers

    • 38
    • 57

    Slight Chance Rain Showers

Today 1 May Winnebago

Partly cloudy in the Morning, then becoming mostly cloudy. Patchy frost early in the morning. A slight chance of Showers in the afternoon. Highs in the lower 50s. North Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 1 May Winnebago

Partly cloudy in the Evening, then clearing. Patchy frost late in the evening. Areas of frost after Midnight, then widespread frost late. Lows in the lower 30s. Northeast Winds around 5 Mph, becoming northwest after midnight.

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Sugar River Forest Preserve Temperature Statistics

May Temperature

Janesville-Rock County (14.3 miles)

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Climate (2021–Present)

Janesville-Rock County (14.3 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.4 °F
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