Green Valley State Park Weather Forecast

    • 70
    • 90

    Chance Thunderstorms

    • 63
    • 81

    Chance Thunderstorms

    • 58
    • 66

    Rain Showers Likely

    • 52
    • 60

    Rain Showers Likely

    • 48
    • 59

    Partly Sunny

    • 52
    • 63

    Mostly Cloudy

    • 55
    • 65

    Slight Chance Rain Showers

Today 18 Sep Union

Partly sunny. A slight chance of Showers in the morning. Highs in the mid 60s. Chance of rain 20 percent.

Tonight 18 Sep Union

Partly cloudy this Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Lows around 70. South Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Green Valley State Park Temperature Statistics

September Temperature

Creston Municipal Airport (6.2 miles)

  • Lowest 13 September, 2026

    53.6 °F

  • Average September

    73.2 °F

  • Highest 1 September, 2026

    95 °F

Climate (2021–2026)

Creston Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    41.6 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    62.2 °F
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