New Underwood Weather Forecast

    • 49
    • 73

    Partly Sunny

    • 55
    • 72

    Chance Thunderstorms

    • 45
    • 77

    Breezy

    • 50
    • 72

    Slight Chance Rain Showers

    • 47
    • 78

    Partly Sunny

    • 51
    • 79

    Mostly Sunny

Today 12 Sep Pennington Co Plains

Partly cloudy. Highs in the lower 70s. North Winds around 5 Mph, becoming east with Gusts up to 20 Mph this afternoon.

Tonight 12 Sep Pennington Co Plains

Partly cloudy. A slight chance of Showers after midnight. Lows around 50. East Winds 10 to 20 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

New Underwood Temperature Statistics

September Temperature

Rapid City, Rapid City Regional Airport (11.2 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 (11.2 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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