Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam
Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >
Current conditions at
Custer, Custer County Airport (KCUT)
Lat: 43.73°NLon: 103.62°WElev: 5600ft.
Fair
46°F
8°C
| Humidity | 40% |
| Wind Speed | W 8 mph |
| Barometer | 30.26 in (1023.9 mb) |
| Dewpoint | 23°F (-5°C) |
| Visibility | 10.00 mi |
| Wind Chill | 42°F (6°C) |
| Last update | 17 Oct 6:53 am MDT |
Extended Forecast for
Keystone SD
Today
High: 76 °F
Sunny
Tonight
Low: 50 °F
Partly Cloudy
Sunday
High: 61 °F
Sunny
Sunday Night
Low: 39 °F
Mostly Clear
Monday
High: 60 °F
Sunny
Monday Night
Low: 46 °F
Mostly Clear
Tuesday
High: 72 °F
Sunny
Tuesday Night
Low: 49 °F
Mostly Clear
Wednesday
High: 70 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 76. West wind 5 to 8 mph becoming light and variable in the afternoon. Winds could gust as high as 24 mph.
Tonight
Partly cloudy, with a low around 50. West wind 5 to 11 mph, with gusts as high as 34 mph.
Sunday
Sunny, with a high near 61. Northwest wind 6 to 9 mph becoming northeast in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly clear, with a low around 39. Light and variable wind. Winds could gust as high as 15 mph.
Monday
Sunny, with a high near 60. Calm wind becoming southeast 5 to 7 mph in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly clear, with a low around 46. Light and variable wind becoming southwest around 6 mph in the evening. Winds could gust as high as 18 mph.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 53.
Friday
A chance of rain. Partly sunny, with a high near 69.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Keystone SD
43.89°N 103.43°W (Elev. 4541 ft)
43.89°N 103.43°W (Elev. 4541 ft)
6:51 am MDT Oct 17, 2026
7am MDT Oct 17, 2026-6pm MDT Oct 23, 2026
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