Green Valley State Park Weather Forecast

    • 39
    • 56

    Mostly Cloudy

    • 33
    • 60

    Mostly Cloudy

    • 10
    • 43

    Chance Rain/Snow

    • 12
    • 23

    Mostly Sunny

    • 22
    • 38

    Partly Sunny

    • 16
    • 36

    Partly Sunny

Today 26 Dec Union

Areas of dense fog in the morning. Mostly sunny. Highs in the mid 50s. Northwest Winds 5 to 10 Mph.

Tonight 26 Dec Union

Mostly cloudy. Lows in the upper 30s. Southeast 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

    26.3 °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

    41.2 °F

  • Average 2020–2025

    51.3 °F

  • Average High 2020–2025

    61.6 °F
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