National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

Lat: 44.05°NLon: 103.05°WElev: 3202ft.

Fair

38°F

3°C

Humidity 46%
Wind Speed NW 3 mph
Barometer 30.12 in (1022.1 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Last update 12 Jan 7:52 am MST
Extended Forecast for

New Underwood SD

  • Today

    Today: Mostly sunny, with a high near 66. West wind 8 to 15 mph, with gusts as high as 31 mph.

    High: 66 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. West wind 14 to 17 mph, with gusts as high as 24 mph.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of rain. Partly sunny, with a high near 55. Windy, with a northwest wind 21 to 26 mph increasing to 27 to 32 mph in the afternoon. Winds could gust as high as 46 mph.

    High: 55 °F

    Chance Rain
    and Windy

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30. Wind chill values as low as 20. Blustery, with a northwest wind 22 to 28 mph, with gusts as high as 43 mph.

    Low: 30 °F

    Partly Cloudy
    and Blustery

  • Wednesday

    Wednesday: Partly sunny, with a high near 45. North wind 8 to 17 mph becoming east in the afternoon. Winds could gust as high as 26 mph.

    High: 45 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a temperature falling to near 30 by 9pm, then rising to around 39 during the remainder of the night. Breezy, with a south wind 7 to 12 mph becoming west 15 to 20 mph after midnight. Winds could gust as high as 33 mph.

    Low: 30 °F⇑

    Mostly Clear
    then Mostly
    Clear and
    Breezy

  • Thursday

    Thursday: Mostly sunny, with a high near 51. Very windy, with a northwest wind 32 to 37 mph increasing to 38 to 43 mph in the afternoon. Winds could gust as high as 55 mph.

    High: 51 °F

    Mostly Sunny
    and Very
    Windy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. Windy, with a northwest wind 33 to 38 mph, with gusts as high as 60 mph.

    Low: 24 °F

    Partly Cloudy
    and Windy

  • Friday

    Friday: Partly sunny, with a high near 35. Very windy.

    High: 35 °F

    Partly Sunny
    and Very
    Windy

Detailed Forecast

Today
Mostly sunny, with a high near 66. West wind 8 to 15 mph, with gusts as high as 31 mph.
Tonight
Mostly cloudy, with a low around 39. West wind 14 to 17 mph, with gusts as high as 24 mph.
Tuesday
A 50 percent chance of rain. Partly sunny, with a high near 55. Windy, with a northwest wind 21 to 26 mph increasing to 27 to 32 mph in the afternoon. Winds could gust as high as 46 mph.
Tuesday Night
Partly cloudy, with a low around 30. Wind chill values as low as 20. Blustery, with a northwest wind 22 to 28 mph, with gusts as high as 43 mph.
Wednesday
Partly sunny, with a high near 45. North wind 8 to 17 mph becoming east in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Mostly clear, with a temperature falling to near 30 by 9pm, then rising to around 39 during the remainder of the night. Breezy, with a south wind 7 to 12 mph becoming west 15 to 20 mph after midnight. Winds could gust as high as 33 mph.
Thursday
Mostly sunny, with a high near 51. Very windy, with a northwest wind 32 to 37 mph increasing to 38 to 43 mph in the afternoon. Winds could gust as high as 55 mph.
Thursday Night
Partly cloudy, with a low around 24. Windy, with a northwest wind 33 to 38 mph, with gusts as high as 60 mph.
Friday
Partly sunny, with a high near 35. Very windy.
Friday Night
Mostly cloudy, with a low around 20. Blustery.
Saturday
Mostly sunny, with a high near 40. Breezy.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Sunny, with a high near 49. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
New Underwood SD
 44.09°N 102.82°W (Elev. 2894 ft)
Last Update:
7:06 am MST Jan 12, 2026
Forecast Valid:
8am MST Jan 12, 2026-6pm MST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation