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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Spearfish / Clyde Ice (KSPF)

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

Fair

50°F

10°C

Humidity 40%
Wind Speed SW 7 mph
Barometer 30.04 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 18 Oct 2:15 am MDT
Extended Forecast for

Spearfish SD

  • Overnight

    Overnight: Mostly clear, with a low around 48. Southwest wind around 6 mph becoming calm.

    Low: 48 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 63. Calm wind becoming east 5 to 9 mph in the afternoon. Winds could gust as high as 17 mph.

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. Southeast wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 64. Southeast wind 7 to 17 mph, with gusts as high as 28 mph.

    High: 64 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. Southeast wind 5 to 14 mph becoming south after midnight. Winds could gust as high as 24 mph.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 72. Light and variable wind becoming northeast 5 to 7 mph.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 48. Southwest wind around 6 mph becoming calm.
Sunday
Sunny, with a high near 63. Calm wind becoming east 5 to 9 mph in the afternoon. Winds could gust as high as 17 mph.
Sunday Night
Mostly clear, with a low around 43. Southeast wind 7 to 11 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 64. Southeast wind 7 to 17 mph, with gusts as high as 28 mph.
Monday Night
Mostly clear, with a low around 46. Southeast wind 5 to 14 mph becoming south after midnight. Winds could gust as high as 24 mph.
Tuesday
Sunny, with a high near 72. Light and variable wind becoming northeast 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 51.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Mostly cloudy, with a low around 57.
Friday
A slight chance of rain. Partly sunny, with a high near 74.
Friday Night
Rain likely. Mostly cloudy, with a low around 45. Breezy.
Saturday
A chance of rain. Partly sunny, with a high near 53. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Spearfish SD
 44.5°N 103.85°W (Elev. 3911 ft)
Last Update:
1:06 am MDT Oct 18, 2026
Forecast Valid:
2am MDT Oct 18, 2026-6pm MDT Oct 24, 2026
 
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