I-90 weather conditions near Spearfish, South Dakota

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: 52°F 2025-10-12T13:55:00-06:00
• This Afternoon 2025-10-12, Isolated Showers and Breezy. Isolated showers before 4pm. Mostly sunny, with a high near 51. Breezy, with a west wind 18 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
• Tonight 2025-10-12, Mostly Clear then Frost. Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 30. Northwest wind 10 to 15 mph becoming light and variable in the evening. Winds could gust as high as 24 mph.
• Columbus Day 2025-10-13, Frost then Mostly Sunny. Widespread frost before 9am. Otherwise, sunny through mid morning, then becoming partly sunny, with a high near 59. Light east wind becoming southeast 13 to 18 mph in the morning. Winds could gust as high as 25 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 18 mph, with gusts as high as 25 mph.
• Tuesday 2025-10-14, Slight Chance Showers then Sunny. A 20 percent chance of showers before noon. Mostly cloudy, then gradually becoming sunny, with a high near 61. Southeast wind around 14 mph, with gusts as high as 24 mph.
• Tuesday Night 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 6 to 14 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 65. East wind 6 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
• Wednesday Night 2025-10-15, Showers. Showers likely and possibly a thunderstorm, then showers after midnight. Mostly cloudy, with a low around 45. East wind 6 to 10 mph becoming west after midnight. Winds could gust as high as 18 mph.
• Thursday 2025-10-16, Showers Likely. Showers likely, mainly before noon. Partly sunny, with a high near 57.
• Thursday Night 2025-10-16, Chance Showers. A chance of showers, mainly before midnight. Partly cloudy, with a low around 40.
• Friday 2025-10-17, Chance Showers. A chance of showers. Mostly sunny, with a high near 58.
• Friday Night 2025-10-17, Chance Showers. A chance of showers. Mostly cloudy, with a low around 37.
• Saturday 2025-10-18, Slight Chance Showers. A slight chance of showers. Mostly sunny, with a high near 53.