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

Areas of Showers and Thunderstorms to Start the Work Week

Areas of rain and thunderstorms are forecast Monday across the central and eastern states. Some mixed rain and snow is possible in the high Sierra Mountains. Heavy to excessive rain may bring flooding in the central Appalachians. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Overcast

56°F

13°C

Humidity 97%
Wind Speed E 13 mph
Barometer 30.14 in (1020.1 mb)
Dewpoint 55°F (13°C)
Visibility 8.00 mi
Last update 20 Sep 7:52 pm MDT
Extended Forecast for

Hermosa SD

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then showers likely. Areas of fog. Low around 48. Northeast wind 6 to 8 mph. Chance of precipitation is 90%.

    Low: 48 °F

    Showers and
    Areas Fog
    then Chance
    Showers and
    Areas Fog

  • Monday

    Monday: A 40 percent chance of showers, mainly between noon and 3pm. Widespread fog, mainly before 9am. Otherwise, mostly cloudy, with a high near 61. Northeast wind 6 to 9 mph becoming east in the afternoon. Winds could gust as high as 18 mph.

    High: 61 °F

    Chance
    Showers and
    Fog

  • Monday Night

    Monday Night: A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 47. Southeast wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 47 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 68. South wind 8 to 16 mph, with gusts as high as 29 mph.

    High: 68 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 52. South wind 11 to 14 mph, with gusts as high as 26 mph.

    Low: 52 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 78. South wind 9 to 18 mph, with gusts as high as 33 mph.

    High: 78 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 10pm, then showers likely. Areas of fog. Low around 48. Northeast wind 6 to 8 mph. Chance of precipitation is 90%.
Monday
A 40 percent chance of showers, mainly between noon and 3pm. Widespread fog, mainly before 9am. Otherwise, mostly cloudy, with a high near 61. Northeast wind 6 to 9 mph becoming east in the afternoon. Winds could gust as high as 18 mph.
Monday Night
A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 47. Southeast wind 6 to 9 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 68. South wind 8 to 16 mph, with gusts as high as 29 mph.
Tuesday Night
Mostly cloudy, with a low around 52. South wind 11 to 14 mph, with gusts as high as 26 mph.
Wednesday
Mostly sunny, with a high near 78. South wind 9 to 18 mph, with gusts as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 54.
Friday
Partly sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Mostly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hermosa SD
 43.84°N 103.19°W (Elev. 3383 ft)
Last Update:
8:26 pm MDT Sep 20, 2026
Forecast Valid:
8pm MDT Sep 20, 2026-6pm MDT Sep 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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