Green Valley State Park Weather Forecast

    • 60
    • 77

    Rain Showers

    • 58
    • 75

    Slight Chance Thunderstorms

    • 61
    • 75

    Chance Thunderstorms

    • 60
    • 79

    Slight Chance Thunderstorms

    • 56
    • 80

    Chance Thunderstorms

    • 54
    • 73

    Slight Chance Thunderstorms

Today 18 Sep Union

Showers likely with a chance of Thunderstorms. Near steady temperature in the lower 70s. South Winds 5 to 10 Mph. Chance of rain 70 percent.

Tonight 18 Sep Union

Showers likely with a chance of Thunderstorms Early, then a chance of Showers after midnight. Patchy fog after midnight. Lows in the lower 60s. South Winds around 5 Mph. Chance of rain 70 percent.

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  • Temperature Real-Time

Green Valley State Park Temperature Statistics

September Temperature

Creston Municipal Airport (6.2 miles)

  • Lowest 7 September, 2025

    41 °F

  • Average September

    67.4 °F

  • Highest 12 September, 2025

    96.8 °F

Climate (2020–Present)

Creston Municipal Airport (6.2 miles)

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  • Average Low 2020–2025

    41 °F

  • Average 2020–2025

    51.1 °F

  • Average High 2020–2025

    61.4 °F
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