Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

54°F

12°C

Humidity 77%
Wind Speed N 6 mph
Barometer 30.35 in (1023.2 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Wind Chill52°F (11°C)
Last update 16 Sep 10:53 pm MDT
Extended Forecast for

Keystone SD

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. Light northwest wind.

    Low: 58 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm.  Mostly cloudy, with a high near 70. Calm wind becoming east around 6 mph in the morning. Winds could gust as high as 21 mph.  Chance of precipitation is 70%.

    High: 70 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before midnight, then showers likely.  Low around 57. East wind around 6 mph becoming calm  after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 100%.

    Low: 57 °F

    Showers then
    Showers
    Likely

  • Friday

    Friday: Mostly cloudy, with a high near 73. Calm wind becoming northeast around 6 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 73 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 40 percent chance of showers after midnight.  Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm  in the evening. Winds could gust as high as 16 mph.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after noon.  High near 66. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 17 mph.  Chance of precipitation is 80%.

    High: 66 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm.  Low around 53. Chance of precipitation is 100%.

    Low: 53 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm.  Mostly cloudy, with a high near 60.

    High: 60 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 58. Light northwest wind.
Thursday
A slight chance of showers before noon, then a chance of showers and thunderstorms between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 70. Calm wind becoming east around 6 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm before midnight, then showers likely. Low around 57. East wind around 6 mph becoming calm after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 100%.
Friday
Mostly cloudy, with a high near 73. Calm wind becoming northeast around 6 mph in the afternoon. Winds could gust as high as 18 mph.
Friday Night
A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 55. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 16 mph.
Saturday
Showers likely, then showers and possibly a thunderstorm after noon. High near 66. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm. Low around 53. Chance of precipitation is 100%.
Sunday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 60.
Sunday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 50.
Monday
Showers likely, mainly after noon. Partly sunny, with a high near 64.
Monday Night
A chance of showers. Partly cloudy, with a low around 51.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 71.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.87°N 103.4°W (Elev. 4413 ft)
9:51 pm MDT Sep 16, 2026
11pm MDT Sep 16, 2026-6pm MDT Sep 23, 2026
 
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