Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

A Few Clouds

50°F

10°C

Humidity 27%
Wind Speed NW 8 mph
Barometer 30.17 in (1022.0 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 19 May 4:53 pm MDT
Extended Forecast for

5 Miles E Custer SD

  • Tonight

    Tonight: Mostly clear, with a low around 32. Light and variable wind. Winds could gust as high as 15 mph.

    Low: 32 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly after 3pm.  Mostly sunny, with a high near 60. Light and variable wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 22 mph.

    High: 60 °F

    Sunny then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37. Southeast wind around 5 mph becoming calm  in the evening. Winds could gust as high as 20 mph.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 63. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 23 mph.  Chance of precipitation is 70%.

    High: 63 °F

    Partly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm.  Low around 39. East wind around 6 mph becoming light and variable. Winds could gust as high as 18 mph.  Chance of precipitation is 90%.

    Low: 39 °F

    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 3pm.  Mostly cloudy, with a high near 57. North wind around 6 mph, with gusts as high as 20 mph.  Chance of precipitation is 50%.

    High: 57 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 20 percent chance of showers before midnight.  Partly cloudy, with a low around 38.

    Low: 38 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Light and variable wind. Winds could gust as high as 15 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly after 3pm. Mostly sunny, with a high near 60. Light and variable wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 22 mph.
Wednesday Night
Mostly cloudy, with a low around 37. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 20 mph.
Thursday
Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 63. Calm wind becoming south 5 to 8 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 70%.
Thursday Night
Showers and possibly a thunderstorm. Low around 39. East wind around 6 mph becoming light and variable. Winds could gust as high as 18 mph. Chance of precipitation is 90%.
Friday
A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 57. North wind around 6 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
Friday Night
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 49.
Memorial Day
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 52.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 80.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles E Custer SD
 43.76°N 103.51°W (Elev. 5249 ft)
5:01 pm MDT May 19, 2026
5pm MDT May 19, 2026-6pm MDT May 26, 2026
 
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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