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

52°F

11°C

Humidity 38%
Wind Speed W 8 mph
Barometer 30.05 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 18 Oct 3:55 am MDT
Extended Forecast for

Saint Onge SD

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 51. West wind 6 to 8 mph.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65. West wind 5 to 7 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 65 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43. Southeast wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 63. Breezy, with a southeast wind 10 to 15 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 39 mph.

    High: 63 °F

    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. Breezy, with a southeast wind 18 to 23 mph becoming light and variable after midnight. Winds could gust as high as 36 mph.

    Low: 44 °F

    Mostly Clear
    and Breezy
    then Clear

  • Tuesday

    Tuesday: Sunny, with a high near 71. Northeast wind around 6 mph becoming calm in the afternoon.

    High: 71 °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 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 51. West wind 6 to 8 mph.
Sunday
Sunny, with a high near 65. West wind 5 to 7 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
Mostly clear, with a low around 43. Southeast wind 9 to 13 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 63. Breezy, with a southeast wind 10 to 15 mph increasing to 21 to 26 mph in the afternoon. Winds could gust as high as 39 mph.
Monday Night
Mostly clear, with a low around 44. Breezy, with a southeast wind 18 to 23 mph becoming light and variable after midnight. Winds could gust as high as 36 mph.
Tuesday
Sunny, with a high near 71. Northeast wind around 6 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 50.
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 75.
Friday Night
Rain likely. Mostly cloudy, with a low around 46. Breezy.
Saturday
A chance of rain. Partly sunny, with a high near 55. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Saint Onge SD
 44.57°N 103.76°W (Elev. 3386 ft)
Last Update:
1:06 am MDT Oct 18, 2026
Forecast Valid:
3am MDT Oct 18, 2026-6pm MDT Oct 24, 2026
 
Forecast Discussion
 
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