Green Valley State Park Weather Forecast

    • 12
    • 16

    Sunny

    • 23
    • 38

    Mostly Sunny

    • 27
    • 44

    Partly Sunny

    • 28
    • 48

    Mostly Cloudy

    • 12
    • 40

    Breezy

    • 29
    • 38

    Mostly Cloudy

    • 21
    • 46

    Mostly Cloudy

Today 14 Dec Union

Sunny. Highs around 16. South Winds 5 to 10 Mph.

Tonight 14 Dec Union

Clear. Not as cool with Lows around 10 above. South Winds 15 to 20 Mph with Gusts up to 30 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

    23 °F

  • Highest 9 December, 2025

    44.6 °F

Climate (2020–Present)

Creston Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    41.2 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    61.5 °F
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