New Underwood Weather Forecast

    • 38
    • 48

    Mostly Cloudy

    • 34
    • 57

    Partly Sunny

    • 34
    • 66

    Partly Sunny

    • 35
    • 62

    Partly Sunny

    • 11
    • 46

    Breezy

    • 14
    • 29

    Mostly Sunny

    • 24
    • 42

    Mostly Sunny

Today 23 Dec Pennington Co Plains

Mostly cloudy. Highs in the upper 40s. Southeast Winds 10 to 20 Mph.

Tonight 23 Dec Pennington Co Plains

Mostly cloudy. Lows in the upper 30s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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New Underwood Temperature Statistics

December Temperature

Rapid City, Rapid City Regional Airport (11.2 miles)

  • Lowest 1 December, 2025

    1.9 °F

  • Average December

    32.1 °F

  • Highest 17 December, 2025

    66 °F

Climate (2020–Present)

Rapid City, Rapid City Regional Airport (11.2 miles)

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  • Average Low 2020–2025

    35.5 °F

  • Average 2020–2025

    48.9 °F

  • Average High 2020–2025

    62.3 °F
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