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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Overcast

61°F

16°C

Humidity 100%
Wind Speed SE 13 mph
Barometer 30.20 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 17 Sep 7:15 pm MDT
Extended Forecast for

Spearfish SD

  • Tonight

    Tonight: Showers and thunderstorms before midnight, then a chance of showers. Patchy fog before 2am, then patchy fog after 4am. Low around 56. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 56 °F

    Showers then
    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. Calm wind becoming north 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.

    High: 76 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Showers likely after midnight. Increasing clouds, with a low around 55. East wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 60%.

    Low: 55 °F

    Mostly Cloudy
    then Showers
    Likely

  • Saturday

    Saturday: Showers likely, then showers and possibly a thunderstorm after noon. High near 68. Light east wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%.

    High: 68 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before 9pm, then showers between 9pm and 3am, then showers and possibly a thunderstorm after 3am. Low around 53. East wind 5 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 53 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm. High near 63. East wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.

    High: 63 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 51. Chance of precipitation is 80%.

    Low: 51 °F

    Showers then
    Chance
    Showers

  • Monday

    Monday: A chance of showers. Partly sunny, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers before midnight. Partly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    Showers then
    Mostly Clear

Detailed Forecast

Tonight
Showers and thunderstorms before midnight, then a chance of showers. Patchy fog before 2am, then patchy fog after 4am. Low around 56. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Friday
Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. Calm wind becoming north 5 to 7 mph in the afternoon. Winds could gust as high as 16 mph.
Friday Night
Showers likely after midnight. Increasing clouds, with a low around 55. East wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 16 mph. Chance of precipitation is 60%.
Saturday
Showers likely, then showers and possibly a thunderstorm after noon. High near 68. Light east wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 80%.
Saturday Night
Showers and possibly a thunderstorm before 9pm, then showers between 9pm and 3am, then showers and possibly a thunderstorm after 3am. Low around 53. East wind 5 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Sunday
Showers and possibly a thunderstorm. High near 63. East wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 100%.
Sunday Night
Showers and possibly a thunderstorm before midnight, then a chance of showers. Low around 51. Chance of precipitation is 80%.
Monday
A chance of showers. Partly sunny, with a high near 69.
Monday Night
A slight chance of showers before midnight. Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 55.
Wednesday
A slight chance of showers and thunderstorms. Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Spearfish SD
 44.48°N 103.85°W (Elev. 3780 ft)
Last Update:
7:21 pm MDT Sep 17, 2026
Forecast Valid:
7pm MDT Sep 17, 2026-6pm MDT Sep 24, 2026
 
Forecast Discussion
 
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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