I-90 weather conditions near Spearfish, South Dakota

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Fair 75°F 2025-06-21T16:35:00-06:00
• Tonight 2025-06-21, Mostly Clear then Chance Showers. A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Increasing clouds, with a low around 55. East wind 5 to 10 mph, with gusts as high as 20 mph.
• Sunday 2025-06-22, Chance Showers. A 30 percent chance of showers and thunderstorms, mainly between 1pm and 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 72. North wind 5 to 15 mph, with gusts as high as 25 mph.
• Sunday Night 2025-06-22, Slight Chance Showers then Mostly Clear. A 20 percent chance of showers before 9pm. Mostly clear, with a low around 46. West wind 5 to 15 mph, with gusts as high as 25 mph.
• Monday 2025-06-23, Sunny. Sunny, with a high near 71. West wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 20 mph.
• Monday Night 2025-06-23, Chance T-storms. A 40 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 52. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
• Tuesday 2025-06-24, Showers Likely. A chance of showers and thunderstorms before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 75. East wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
• Tuesday Night 2025-06-24, T-storms then Chance T-storms. Showers and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms after midnight. Low around 56. East wind 10 to 15 mph becoming light southeast after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 80%.
• Wednesday 2025-06-25, Showers Likely. A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 75. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
• Wednesday Night 2025-06-25, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 54.
• Thursday 2025-06-26, Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms after noon. Sunny, with a high near 82.
• Thursday Night 2025-06-26, Partly Cloudy. Partly cloudy, with a low around 60.
• Friday 2025-06-27, Mostly Sunny. Mostly sunny, with a high near 85.
• Friday Night 2025-06-27, Chance T-storms. A chance of showers and thunderstorms. Partly cloudy, with a low around 57.
• Saturday 2025-06-28, Mostly Sunny then Chance T-storms. A chance of showers and thunderstorms. Mostly sunny, with a high near 77.