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.

Overcast

54°F

12°C

Humidity 83%
Wind Speed W 3 mph
Barometer 30.17 in (1017.8 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 20 Sep 11:53 am MDT
Extended Forecast for

Custer SD

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. Patchy fog. High near 55. Calm wind becoming east 5 to 7 mph. Winds could gust as high as 15 mph. Chance of precipitation is 100%.

    High: 55 °F

    Showers and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms before midnight, then a chance of showers between midnight and 3am. Patchy fog. Low around 44. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%.

    Low: 44 °F

    Showers and
    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Monday

    Monday: Showers likely before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Widespread fog, mainly before 9am. Otherwise, cloudy, with a high near 55. Calm wind becoming east around 6 mph in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 60%.

    High: 55 °F

    Showers
    Likely and
    Fog

  • Monday Night

    Monday Night: A 50 percent chance of showers. Cloudy, with a low around 43. East wind 3 to 6 mph. Winds could gust as high as 16 mph.

    Low: 43 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60. South wind 5 to 8 mph, with gusts as high as 22 mph.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 49. Southeast wind 5 to 8 mph becoming southwest after midnight. Winds could gust as high as 21 mph.

    Low: 49 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 49.

    Low: 49 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. Patchy fog. High near 55. Calm wind becoming east 5 to 7 mph. Winds could gust as high as 15 mph. Chance of precipitation is 100%.
Tonight
Showers and thunderstorms before midnight, then a chance of showers between midnight and 3am. Patchy fog. Low around 44. Northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%.
Monday
Showers likely before noon, then a chance of showers and thunderstorms between noon and 3pm, then a chance of showers after 3pm. Widespread fog, mainly before 9am. Otherwise, cloudy, with a high near 55. Calm wind becoming east around 6 mph in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 60%.
Monday Night
A 50 percent chance of showers. Cloudy, with a low around 43. East wind 3 to 6 mph. Winds could gust as high as 16 mph.
Tuesday
Mostly cloudy, with a high near 60. South wind 5 to 8 mph, with gusts as high as 22 mph.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 49. Southeast wind 5 to 8 mph becoming southwest after midnight. Winds could gust as high as 21 mph.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 50.
Friday
Mostly sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 51.
Saturday
Sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Custer SD
 43.76°N 103.6°W (Elev. 5417 ft)
Last Update:
12:26 pm MDT Sep 20, 2026
Forecast Valid:
12pm MDT Sep 20, 2026-6pm MDT Sep 26, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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