I-90 weather conditions near Spearfish, South Dakota
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fair 46°F 2025-11-07T01:15:00-07:00 
Overnight 2025-11-07, Mostly Clear and Breezy. Mostly clear, with a low around 38. Breezy, with a west wind 14 to 20 mph, with gusts as high as 34 mph.Friday 2025-11-07, Sunny then Chance Rain. A 30 percent chance of rain, mainly after 5pm. Increasing clouds, with a high near 58. West wind 10 to 14 mph, with gusts as high as 20 mph.
Friday Night 2025-11-07, Chance Rain then Slight Chance Snow and Breezy. A chance of rain before 11pm, then a slight chance of snow after 2am. Cloudy during the early evening, then gradual clearing, with a low around 31. Wind chill values as low as 20. Breezy, with a west wind 14 to 19 mph increasing to 21 to 26 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Saturday 2025-11-08, Snow Likely and Breezy. Snow likely, mainly before 11am. Cloudy, with a high near 36. Wind chill values as low as 19. Breezy, with a northwest wind 23 to 28 mph decreasing to 17 to 22 mph in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.Saturday Night 2025-11-08, Slight Chance Snow then Mostly Cloudy. A 20 percent chance of snow before 11pm. Mostly cloudy, with a low around 25. Northwest wind 7 to 13 mph, with gusts as high as 23 mph.
Sunday 2025-11-09, Mostly Sunny. Mostly sunny, with a high near 39. Northwest wind 5 to 7 mph becoming east in the afternoon.- Sunday Night 2025-11-09, Partly Cloudy. Partly cloudy, with a low around 25. Southwest wind around 6 mph.
- Monday 2025-11-10, Mostly Sunny. Mostly sunny, with a high near 58. West wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night 2025-11-10, Mostly Cloudy. Mostly cloudy, with a low around 45.
Veterans Day 2025-11-11, Sunny. Sunny, with a high near 58.- Tuesday Night 2025-11-11, Partly Cloudy. Partly cloudy, with a low around 38.
- Wednesday 2025-11-12, Mostly Sunny. Mostly sunny, with a high near 54.
- Wednesday Night 2025-11-12, Partly Cloudy. Partly cloudy, with a low around 38.
- Thursday 2025-11-13, Mostly Sunny. Mostly sunny, with a high near 59.