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

54°F

12°C

Humidity 87%
Wind Speed SE 3 mph
Barometer 30.11 in (1013.8 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 19 Sep 3:53 am MDT
Extended Forecast for

Custer State Park SD

  • Today

    Today: Showers and thunderstorms likely, mainly after 5pm. Areas of fog before noon. Otherwise, cloudy, with a high near 63. Light and variable wind becoming east 5 to 7 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

    High: 63 °F

    Chance
    Showers and
    Areas Fog
    then T-storms
    Likely

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm, then showers after midnight. Low around 52. East wind around 7 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 52 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 56. East wind 5 to 7 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 56 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 48. North wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 100%.

    Low: 48 °F

    Showers then
    Showers
    Likely

  • Monday

    Monday: A 50 percent chance of showers. Mostly cloudy, with a high near 58. Light and variable wind becoming east around 6 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 58 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 48. East wind around 6 mph becoming light and variable. Winds could gust as high as 18 mph.

    Low: 48 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 67.

    High: 67 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: A slight chance of showers. Partly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    Showers

  • Wednesday

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

    High: 73 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

Detailed Forecast

Today
Showers and thunderstorms likely, mainly after 5pm. Areas of fog before noon. Otherwise, cloudy, with a high near 63. Light and variable wind becoming east 5 to 7 mph in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Tonight
Showers likely and possibly a thunderstorm, then showers after midnight. Low around 52. East wind around 7 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 56. East wind 5 to 7 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Sunday Night
Showers and possibly a thunderstorm. Low around 48. North wind 3 to 7 mph. Winds could gust as high as 18 mph. Chance of precipitation is 100%.
Monday
A 50 percent chance of showers. Mostly cloudy, with a high near 58. Light and variable wind becoming east around 6 mph in the afternoon. Winds could gust as high as 18 mph.
Monday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 48. East wind around 6 mph becoming light and variable. Winds could gust as high as 18 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 67.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 54.
Wednesday
A slight chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 73.
Wednesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 55.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 56.
Friday
Mostly 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 State Park SD
 43.72°N 103.42°W (Elev. 4583 ft)
Last Update:
3:21 am MDT Sep 19, 2026
Forecast Valid:
4am MDT Sep 19, 2026-6pm MDT Sep 25, 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