Marsh Wetlands State Nature Preserve Weather Forecast

    • 22
    • 40

    Mostly Cloudy

    • 15
    • 28

    Partly Sunny

    • 28
    • 36

    Mostly Cloudy

    • 27
    • 45

    Slight Chance Rain

    • 34
    • 41

    Mostly Cloudy

    • 41
    • 55

    Rain Likely

Today 20 Dec Portage

Partly sunny in the Morning, then becoming mostly cloudy. Highs in the lower 40s. South Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 20 Dec Portage

Partly cloudy and cooler. Near steady temperature around 18. South Winds 5 to 10 Mph.

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Marsh Wetlands State Nature Preserve Temperature Statistics

December Temperature

Portage County Airport (5 miles)

  • Lowest 16 December, 2025

    3.2 °F

  • Average December

    24 °F

  • Highest 17 December, 2025

    42.4 °F

Climate (2020–Present)

Portage County Airport (5 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    49.9 °F

  • Average High 2020–2025

    59.8 °F
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