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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

Lat: 43.73°NLon: 103.62°WElev: 5600ft.

Fair

57°F

14°C

Humidity 90%
Wind Speed Calm
Barometer 30.15 in (1016.2 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 19 Sep 8:53 am MDT
Extended Forecast for

Hill City SD

  • Today

    Today: Showers and thunderstorms likely, mainly after 3pm. Patchy fog before noon. Otherwise, cloudy, with a high near 63. Calm wind becoming east around 6 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%.

    High: 63 °F

    Chance
    Showers and
    Patchy Fog
    then T-storms
    Likely

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm, then showers after midnight. Low around 48. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 90%.

    Low: 48 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 55. Calm wind becoming east around 6 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 90%.

    High: 55 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 44. Light and variable wind. Winds could gust as high as 16 mph. Chance of precipitation is 100%.

    Low: 44 °F

    Showers then
    Showers
    Likely

  • Monday

    Monday: Showers likely, mainly after noon. Mostly cloudy, with a high near 57. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%.

    High: 57 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 46. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 18 mph.

    Low: 46 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73.

    High: 73 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 3pm. Patchy fog before noon. Otherwise, cloudy, with a high near 63. Calm wind becoming east around 6 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 70%.
Tonight
Showers likely and possibly a thunderstorm, then showers after midnight. Low around 48. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 90%.
Sunday
Showers and possibly a thunderstorm. High near 55. Calm wind becoming east around 6 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm. Low around 44. Light and variable wind. Winds could gust as high as 16 mph. Chance of precipitation is 100%.
Monday
Showers likely, mainly after noon. Mostly cloudy, with a high near 57. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 46. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Tuesday
Mostly sunny, with a high near 68.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73.
Wednesday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 51.
Thursday
Sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 52.
Friday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hill City SD
 43.93°N 103.56°W (Elev. 5161 ft)
Last Update:
8:31 am MDT Sep 19, 2026
Forecast Valid:
9am MDT Sep 19, 2026-6pm MDT Sep 25, 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