Green Valley State Park Weather Forecast

    • 71
    • 94

    Mostly Sunny

    • 70
    • 93

    Mostly Sunny

    • 68
    • 90

    Chance Rain Showers

    • 71
    • 89

    Partly Sunny

    • 71
    • 95

    Chance Thunderstorms

    • 67
    • 89

    Chance Rain Showers

    • 65
    • 85

    Partly Sunny

Today 4 Sep Union

Mostly sunny. Near steady temperature in the lower 90s. Southwest Winds around 10 Mph. Heat index Values up to 102.

Tonight 4 Sep Union

Mostly clear. Humid with Lows around 70. South Winds 5 to 10 Mph with Gusts up to 20 Mph. Heat index Values up to 101 early this evening.

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Green Valley State Park Temperature Statistics

September Temperature

Creston Municipal Airport (6.2 miles)

  • Lowest 2 September, 2026

    68 °F

  • Average September

    82 °F

  • Highest 1 September, 2026

    95 °F

Climate (2021–2026)

Creston Municipal Airport (6.2 miles)

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  • Average Low 2021–2026

    41.5 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    62.2 °F
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