Green Valley Weather Forecast

    • 48
    • 72

    Partly Sunny

    • 55
    • 71

    Chance Thunderstorms

    • 44
    • 77

    Mostly Sunny

    • 48
    • 71

    Partly Sunny

    • 47
    • 77

    Partly Sunny

    • 50
    • 79

    Mostly Sunny

Today 12 Sep Rapid City

Partly cloudy. Highs in the lower 70s. Northeast Winds 5 to 10 Mph, becoming southeast with Gusts up to 25 Mph this afternoon.

Tonight 12 Sep Rapid City

Partly cloudy. Lows in the upper 40s. Northeast Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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Green Valley Temperature Statistics

September Temperature

Rapid City, Rapid City Regional Airport (2.5 miles)

  • Lowest 8 September, 2026

    51.7 °F

  • Average September

    73.8 °F

  • Highest 4 September, 2026

    97.6 °F

Climate (2021–2026)

Rapid City, Rapid City Regional Airport (2.5 miles)

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  • Average Low 2021–2026

    35.7 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    63.4 °F
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