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

Erin Strengthens to a Hurricane; Heavy Rainfall Possible in Puerto Rico and the Virgin Islands, the Upper Midwest, South Texas

Hurricane Erin may bring isolated flash and urban flooding, landslides or mudslides, and possible tropical storm conditions to Puerto Rico and the U.S. Virgin Islands this weekend. Scattered thunderstorms and heavy rainfall may bring areas of flooding this weekend over the Upper Midwest. A tropical disturbance will bring locally heavy rain and mainly urban flash flooding to far southern Texas. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Mostly Cloudy

74°F

23°C

Humidity 48%
Wind Speed NE 3 mph
Barometer 30.14 in (1013.6 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 15 Aug 7:53 pm MDT
Extended Forecast for

Edgemont SD

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 67. Southeast wind 5 to 15 mph becoming north after midnight.

    Low: 67 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93. Southwest wind 5 to 15 mph becoming northwest in the morning. Winds could gust as high as 25 mph.

    High: 93 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. East wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 94. East wind 5 to 15 mph becoming southeast in the morning. Winds could gust as high as 20 mph.

    High: 94 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 62. East wind 5 to 15 mph becoming northeast after midnight. Winds could gust as high as 20 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. North wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. East wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 67. Southeast wind 5 to 15 mph becoming north after midnight.
Saturday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 93. Southwest wind 5 to 15 mph becoming northwest in the morning. Winds could gust as high as 25 mph.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 63. East wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 94. East wind 5 to 15 mph becoming southeast in the morning. Winds could gust as high as 20 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 62. East wind 5 to 15 mph becoming northeast after midnight. Winds could gust as high as 20 mph.
Monday
Sunny, with a high near 94. North wind 5 to 15 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 62. Northeast wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 96. East wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Sunny, with a high near 99.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Edgemont SD
 43.31°N 103.83°W (Elev. 3589 ft)
Last Update:
4:50 pm MDT Aug 15, 2025
Forecast Valid:
8pm MDT Aug 15, 2025-6pm MDT Aug 22, 2025
 
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