Green Valley State Park Weather Forecast

    • 6
    • 22

    Increasing Clouds

    • 25
    • 32

    Partly Sunny

    • 25
    • 43

    Mostly Cloudy

    • 18
    • 33

    Mostly Cloudy

    • 1
    • 26

    Mostly Cloudy

    • -5
    • 11

    Mostly Cloudy

Today 7 Dec Union

Mostly cloudy this Morning, then becoming mostly sunny. Highs in the lower 20s. North Winds around 15 Mph, Diminishing to 5 to 10 Mph this afternoon.

Tonight 7 Dec Union

Mostly cloudy. Lows around 7 above. Northeast Winds around 5 Mph, becoming southeast after midnight.

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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

    18.9 °F

  • Highest 5 December, 2025

    35.6 °F

Climate (2020–Present)

Creston Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    41.2 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61.6 °F
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