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

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Mostly Cloudy

43°F

6°C

Humidity 56%
Wind Speed SW 3 mph
Barometer 30.00 in (1012.6 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 18 Mar 5:53 am MDT
Extended Forecast for

Keystone SD

  • Today

    Today: Mostly sunny, with a high near 70. West wind 7 to 14 mph, with gusts as high as 33 mph.

    High: 70 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. West wind 5 to 10 mph, with gusts as high as 26 mph.

    Low: 42 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 75. West wind 5 to 8 mph, with gusts as high as 26 mph.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. West wind 3 to 6 mph. Winds could gust as high as 16 mph.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74. Northwest wind 5 to 8 mph, with gusts as high as 25 mph.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 51. Calm wind becoming west around 6 mph after midnight. Winds could gust as high as 15 mph.

    Low: 51 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 79. West wind 6 to 9 mph, with gusts as high as 29 mph.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 35. North wind 5 to 10 mph, with gusts as high as 29 mph.

    Low: 35 °F

    Mostly Cloudy
    then Slight
    Chance
    Rain/Snow

  • Sunday

    Sunday: A slight chance of snow before noon, then a slight chance of rain. Partly sunny, with a high near 51.

    High: 51 °F

    Slight Chance
    Snow then
    Slight Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 70. West wind 7 to 14 mph, with gusts as high as 33 mph.
Tonight
Mostly clear, with a low around 42. West wind 5 to 10 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 75. West wind 5 to 8 mph, with gusts as high as 26 mph.
Thursday Night
Partly cloudy, with a low around 50. West wind 3 to 6 mph. Winds could gust as high as 16 mph.
Friday
Mostly sunny, with a high near 74. Northwest wind 5 to 8 mph, with gusts as high as 25 mph.
Friday Night
Mostly clear, with a low around 51. Calm wind becoming west around 6 mph after midnight. Winds could gust as high as 15 mph.
Saturday
Mostly sunny, with a high near 79. West wind 6 to 9 mph, with gusts as high as 29 mph.
Saturday Night
A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 35. North wind 5 to 10 mph, with gusts as high as 29 mph.
Sunday
A slight chance of snow before noon, then a slight chance of rain. Partly sunny, with a high near 51.
Sunday Night
A slight chance of snow after midnight. Mostly cloudy, with a low around 31.
Monday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.89°N 103.43°W (Elev. 4541 ft)
Last Update:
4:48 am MDT Mar 18, 2026
Forecast Valid:
5am MDT Mar 18, 2026-6pm MDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation