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

Areas of Heavy Rainfall and Heat Early This Week

Excessive rainfall may produce locally considerable flash flooding over parts of South Texas, the western Gulf Coast, and lower Mississippi River Valley today into Thursday. Rainfall totals of 5 to 10 inches are expected. Hot temperatures may cause heat illnesses over central and northern California and the Pacific Northwest through Tuesday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

65°F

18°C

Humidity 23%
Wind Speed NW 14 G 29 mph
Barometer 30.15 in (1017.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 15 Jun 11:53 am MDT
Extended Forecast for

6 Miles NNW Keystone SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a steady temperature around 69. Northwest wind 7 to 13 mph, with gusts as high as 33 mph.

    High: 69 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. Northwest wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 30 mph.

    Low: 47 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers before noon. Partly sunny, with a high near 80. West wind 3 to 8 mph. Winds could gust as high as 26 mph.

    High: 80 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54. West wind 3 to 7 mph. Winds could gust as high as 26 mph.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 70. Northwest wind 8 to 14 mph, with gusts as high as 39 mph.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 46. Northwest wind 8 to 13 mph becoming light after midnight. Winds could gust as high as 36 mph.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 69.

    High: 69 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a steady temperature around 69. Northwest wind 7 to 13 mph, with gusts as high as 33 mph.
Tonight
Mostly cloudy, with a low around 47. Northwest wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 30 mph.
Tuesday
A 20 percent chance of showers before noon. Partly sunny, with a high near 80. West wind 3 to 8 mph. Winds could gust as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 54. West wind 3 to 7 mph. Winds could gust as high as 26 mph.
Wednesday
Sunny, with a high near 70. Northwest wind 8 to 14 mph, with gusts as high as 39 mph.
Wednesday Night
Partly cloudy, with a low around 46. Northwest wind 8 to 13 mph becoming light after midnight. Winds could gust as high as 36 mph.
Thursday
Sunny, with a high near 69.
Thursday Night
Partly cloudy, with a low around 45.
Juneteenth
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 49.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 73.
Saturday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 49.
Sunday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles NNW Keystone SD
 43.98°N 103.47°W (Elev. 4800 ft)
Last Update:
12:07 pm MDT Jun 15, 2026
Forecast Valid:
12pm MDT Jun 15, 2026-6pm MDT Jun 21, 2026
 
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Additional Resources

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Chance of Precipitation