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 45°F 2025-10-13T19:55:00-06:00 Tonight 2025-10-13, Mostly Cloudy then Slight Chance Showers. A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 42. Southeast wind 13 to 17 mph, with gusts as high as 24 mph.
Tuesday 2025-10-14, Slight Chance Showers then Mostly Sunny. A 20 percent chance of showers before noon. Mostly cloudy, then gradually becoming sunny, with a high near 59. East wind around 11 mph, with gusts as high as 21 mph.
Tuesday Night 2025-10-14, Partly Cloudy then Slight Chance Showers. A 20 percent chance of showers after midnight. Partly cloudy, with a low around 42. Southeast wind 6 to 10 mph, with gusts as high as 18 mph.
Wednesday 2025-10-15, Chance Showers. A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 60. East wind 6 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Wednesday Night 2025-10-15, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 46. East wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Thursday 2025-10-16, Showers Likely. Showers likely. Mostly cloudy, with a high near 53. West wind 7 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Thursday Night 2025-10-16, Chance Showers. A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 40. West wind around 11 mph, with gusts as high as 21 mph.Friday 2025-10-17, Slight Chance Showers then Partly Sunny. A slight chance of showers before noon. Partly sunny, with a high near 56. West wind 11 to 18 mph, with gusts as high as 30 mph.
Friday Night 2025-10-17, Slight Chance Rain. A slight chance of rain. Mostly cloudy, with a low around 37.
Saturday 2025-10-18, Chance Rain and Breezy. A chance of rain, mainly before noon. Mostly sunny, with a high near 51. Breezy.
Saturday Night 2025-10-18, Mostly Clear. Mostly clear, with a low around 37.
Sunday 2025-10-19, Sunny. Sunny, with a high near 64.- Sunday Night 2025-10-19, Partly Cloudy. Partly cloudy, with a low around 43.
Monday 2025-10-20, Slight Chance Showers. A slight chance of showers. Mostly sunny, with a high near 60.