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: A Few Clouds 36°F 2025-10-13T09:15:00-06:00 
Columbus Day 2025-10-13, Increasing Clouds. Increasing clouds, with a high near 57. Southeast wind 8 to 18 mph, with gusts as high as 30 mph.Tonight 2025-10-13, Mostly Cloudy then Slight Chance Showers. A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 42. East wind 13 to 18 mph, with gusts as high as 31 mph.
Tuesday 2025-10-14, Decreasing Clouds. Cloudy, then gradually becoming mostly sunny, with a high near 61. Southeast wind 11 to 14 mph, with gusts as high as 24 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 45. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.
Wednesday 2025-10-15, Chance Showers. A 50 percent chance of showers. Mostly sunny, with a high near 62. East wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday Night 2025-10-15, Showers. Showers and possibly a thunderstorm. Low around 46. East wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%.
Thursday 2025-10-16, Showers Likely. Showers likely, mainly before noon. Mostly cloudy, with a high near 54. West wind 7 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Thursday Night 2025-10-16, Chance Showers. A chance of showers. Mostly cloudy, with a low around 41. West wind around 11 mph, with gusts as high as 21 mph.
Friday 2025-10-17, Chance Showers. A chance of showers, mainly before noon. Mostly sunny, with a high near 57.
Friday Night 2025-10-17, Chance Showers. A chance of showers, mainly after midnight. Partly cloudy, with a low around 39.- Saturday 2025-10-18, Slight Chance Showers and Breezy. A slight chance of showers. Mostly sunny, with a high near 51. Breezy.
Saturday Night 2025-10-18, Mostly Clear. Mostly clear, with a low around 39.- Sunday 2025-10-19, Sunny. Sunny, with a high near 63.