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: 45°F 2025-10-12T08:55:00-06:00 - Today 2025-10-12, Chance Showers and Breezy. A 50 percent chance of showers, mainly between 10am and 2pm. Mostly sunny, with a high near 54. Breezy, with a west wind 15 to 23 mph, with gusts as high as 34 mph.
Tonight 2025-10-12, Mostly Clear then Frost. Widespread frost, mainly after 3am. Otherwise, mostly clear, with a low around 31. Northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 23 mph.
Columbus Day 2025-10-13, Frost then Mostly Sunny. Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 58. Light southeast wind increasing to 11 to 16 mph in the morning. Winds could gust as high as 28 mph.Monday Night 2025-10-13, Mostly Cloudy then Chance Showers. A 30 percent chance of showers after midnight. Mostly cloudy, with a low around 42. Southeast wind 14 to 17 mph, with gusts as high as 29 mph.
Tuesday 2025-10-14, Slight Chance Showers then Mostly Sunny. A 20 percent chance of showers before noon. Partly sunny, with a high near 58. Southeast wind 13 to 15 mph, with gusts as high as 25 mph.
Tuesday Night 2025-10-14, Partly Cloudy then Chance Showers. A 30 percent chance of showers after midnight. Partly cloudy, with a low around 46. Southeast wind 8 to 13 mph, with gusts as high as 22 mph.
Wednesday 2025-10-15, Chance Showers. A chance of showers, with thunderstorms also possible after noon. Mostly sunny, with a high near 66. East wind 8 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Wednesday Night 2025-10-15, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 45. East wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph.
Thursday 2025-10-16, Chance Showers. A chance of showers. Partly sunny, with a high near 53.
Thursday Night 2025-10-16, Chance Showers. A chance of showers, mainly before midnight. Partly cloudy, with a low around 39.
Friday 2025-10-17, Slight Chance Showers. A slight chance of showers. Mostly sunny, with a high near 56.- Friday Night 2025-10-17, Slight Chance Showers. A slight chance of showers. Mostly cloudy, with a low around 38.
- Saturday 2025-10-18, Chance Showers. A chance of showers. Mostly sunny, with a high near 50.