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

Spearfish / Clyde Ice (KSPF)

Lat: 44.48°NLon: 103.78°WElev: 3898ft.

Fair

63°F

17°C

Humidity 83%
Wind Speed SW 6 mph
Barometer 30.27 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 15 Aug 9:55 pm MDT
Extended Forecast for

3 Miles ENE Saint Onge SD

  • Tonight

    Tonight: Partly cloudy, with a low around 56. South wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Calm wind becoming east 5 to 9 mph in the morning. Winds could gust as high as 17 mph.

    High: 79 °F

    Sunny then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 59. Southeast wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph.

    Low: 59 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 83. West wind 6 to 8 mph becoming northeast in the afternoon. Winds could gust as high as 17 mph.

    High: 83 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind 5 to 7 mph becoming west after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 79. West wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80.

    High: 80 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.

    Low: 56 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 56. South wind around 5 mph becoming calm in the evening.
Sunday
A 40 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 79. Calm wind becoming east 5 to 9 mph in the morning. Winds could gust as high as 17 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Mostly clear, with a low around 59. Southeast wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph.
Monday
Mostly sunny, with a high near 83. West wind 6 to 8 mph becoming northeast in the afternoon. Winds could gust as high as 17 mph.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 58. South wind 5 to 7 mph becoming west after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 60%.
Tuesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 79. West wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 80.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 56.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 57.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Saint Onge SD
 44.57°N 103.7°W (Elev. 3465 ft)
Last Update:
8:36 pm MDT Aug 15, 2026
Forecast Valid:
10pm MDT Aug 15, 2026-6pm MDT Aug 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation