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 moderate to locally heavy rain to portions of South Texas into Saturday. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

73°F

23°C

Humidity 51%
Wind Speed SE 7 mph
Barometer 30.13 in (1012.3 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 15 Aug 9:53 am MDT
Extended Forecast for

2 Miles ESE Hill City SD

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. East wind around 5 mph, with gusts as high as 20 mph.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 63 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 78 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 59 °F

    Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 82 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 58 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon. Winds could gust as high as 15 mph.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.

    Low: 59 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after noon. Sunny, with a high near 83.

    High: 83 °F

    Sunny then
    Slight Chance
    T-storms

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82. East wind around 5 mph, with gusts as high as 20 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, with a low around 63. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Saturday
A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 58. Southeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Monday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
A slight chance of showers and thunderstorms before midnight. Mostly clear, with a low around 59. East wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ESE Hill City SD
 43.93°N 103.53°W (Elev. 5000 ft)
Last Update:
9:29 am MDT Aug 15, 2025
Forecast Valid:
10am MDT Aug 15, 2025-6pm MDT Aug 21, 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