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: Overcast 45°F 2025-10-14T06:35:00-06:00 Today 2025-10-14, Slight Chance Showers then Sunny. A 20 percent chance of showers before noon. Cloudy through mid morning, then gradual clearing, with a high near 61. Light east wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Tonight 2025-10-14, Mostly Clear then Slight Chance Showers. A 20 percent chance of showers after midnight. Partly cloudy, with a low around 43. Southeast wind 5 to 10 mph, with gusts as high as 18 mph.
Wednesday 2025-10-15, Showers Likely and Patchy Fog. Showers likely, mainly before noon. Patchy fog between 7am and 9am. Otherwise, partly sunny, with a high near 59. East wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday Night 2025-10-15, Showers. Showers and possibly a thunderstorm. Low around 46. East wind 5 to 10 mph becoming west after midnight. Winds could gust as high as 16 mph. Chance of precipitation is 90%.
Thursday 2025-10-16, Showers. Showers. High near 53. Northwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Thursday Night 2025-10-16, Chance Showers. A 50 percent chance of showers. Mostly cloudy, with a low around 41. West wind around 14 mph, with gusts as high as 23 mph.Friday 2025-10-17, Breezy. Chance Showers then Partly Sunny. A 30 percent chance of showers before noon. Partly sunny, with a high near 55. Breezy, with a west wind 13 to 22 mph, with gusts as high as 32 mph.
Friday Night 2025-10-17, Partly Cloudy then Slight Chance Showers. A slight chance of showers after midnight. Partly cloudy, with a low around 38. West wind around 15 mph, with gusts as high as 26 mph.
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 37.
Sunday 2025-10-19, Sunny. Sunny, with a high near 66.- Sunday Night 2025-10-19, Mostly Clear. Mostly clear, with a low around 46.
- Monday 2025-10-20, Slight Chance Showers. A slight chance of showers. Mostly sunny, with a high near 62.