Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

72°F

22°C

Humidity 25%
Wind Speed E 8 mph
Barometer 29.79 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 21 Mar 12:55 pm MDT
Extended Forecast for

Spearfish SD

Red Flag Warning March 21, 01:03pm until March 21, 09:00pm
Click here for hazard details and duration
Red Flag Warning
  •  
    Red Flag Warning March 21, 01:03pm until March 21, 09:00pm

    NOW until 9:00pm Sat

    Red Flag Warning

  • This Afternoon

    High: 87 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 50 percent chance of showers.  Mostly cloudy, with a low around 39. Northeast wind 13 to 18 mph becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 39 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers before noon.  Mostly cloudy, then gradually becoming sunny, with a high near 57. Light northwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 22 mph.

    High: 57 °F

    Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. Northwest wind 5 to 10 mph becoming light and variable  in the evening. Winds could gust as high as 21 mph.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 63. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. Northeast wind around 6 mph becoming calm  in the evening.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 65. Light and variable wind becoming north 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

    High: 65 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47. East wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph.

    Low: 47 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Increasing clouds, with a high near 87. North wind 9 to 16 mph, with gusts as high as 22 mph.
Tonight
A 50 percent chance of showers. Mostly cloudy, with a low around 39. Northeast wind 13 to 18 mph becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Sunday
A 40 percent chance of showers before noon. Mostly cloudy, then gradually becoming sunny, with a high near 57. Light northwest wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 37. Northwest wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 21 mph.
Monday
Mostly sunny, with a high near 63. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 41. Northeast wind around 6 mph becoming calm in the evening.
Tuesday
Mostly cloudy, with a high near 65. Light and variable wind becoming north 5 to 9 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 47. East wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph.
Wednesday
Partly sunny, with a high near 72.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Partly sunny, with a high near 54.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 31.
Friday
Partly sunny, with a high near 52.
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ABOUT THIS FORECAST

 
Point Forecast:
Spearfish SD
 44.48°N 103.85°W (Elev. 3780 ft)
12:37 pm MDT Mar 21, 2026
1pm MDT Mar 21, 2026-6pm MDT Mar 27, 2026
 
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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