Green Valley State Park Weather Forecast

    • 12
    • 20

    Blowing Snow

    • 24
    • 37

    Partly Sunny

    • 17
    • 38

    Mostly Cloudy

    • 18
    • 30

    Partly Sunny

    • 21
    • 37

    Partly Sunny

    • 19
    • 37

    Partly Sunny

Today 29 Dec Union

Partly sunny in the Morning, then clearing. Windy and much cooler with Highs in the lower 20s. Northwest Winds 20 to 30 Mph with Gusts up to 40 Mph, Diminishing to 15 to 20 Mph with Gusts up to 30 Mph in the afternoon.

Tonight 29 Dec Union

Mostly clear. Lows around 12. West Winds 5 to 10 Mph.

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Green Valley State Park Temperature Statistics

December Temperature

Creston Municipal Airport (6.2 miles)

  • Lowest 4 December, 2025

    -4 °F

  • Average December

    28.4 °F

  • Highest 22 December, 2025

    55.4 °F

Climate (2020–Present)

Creston Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    41.3 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61.6 °F
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