Wapsipinicon State Park Weather Forecast

    • 11
    • 27

    Mostly Cloudy

    • 23
    • 36

    Mostly Cloudy

    • 33
    • 38

    Rain Likely

    • 1
    • 40

    Partly Sunny

    • 22
    • 32

    Mostly Cloudy

    • 16
    • 39

    Mostly Cloudy

Today 15 Dec Jones

Mostly cloudy. Not as cool with Highs in the mid 20s. Southwest Winds 5 to 10 Mph.

Tonight 15 Dec Jones

Mostly cloudy. Patchy fog after midnight. Not as cool with Lows around 11. Southwest Winds around 5 Mph, becoming southeast after midnight.

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Wapsipinicon State Park Temperature Statistics

December Temperature

Monticello Regional Airport (10.6 miles)

  • Lowest 4 December, 2025

    -13 °F

  • Average December

    18.1 °F

  • Highest 9 December, 2025

    41 °F

Climate (2020–Present)

Monticello Regional Airport (10.6 miles)

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  • Average Low 2020–2025

    37.7 °F

  • Average 2020–2025

    48.5 °F

  • Average High 2020–2025

    58.6 °F
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