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 64°F 2025-06-22T00:55:00-06:00 
Overnight 2025-06-22, Chance Showers. A 30 percent chance of showers and thunderstorms, mainly between 3am and 5am. Mostly cloudy, with a low around 56. Northeast wind 5 to 10 mph becoming north.
Sunday 2025-06-22, Chance Showers. A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, then gradually becoming sunny, with a high near 71. Northwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.Sunday Night 2025-06-22, Slight Chance Showers then Mostly Clear. A 20 percent chance of showers before 9pm. Partly cloudy, with a low around 47. West wind 10 to 15 mph, with gusts as high as 25 mph.
Monday 2025-06-23, Sunny. Sunny, with a high near 69. West wind around 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 73. 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 5 to 15 mph, with gusts 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 73. Southeast wind 5 to 10 mph becoming east in the morning. Winds could gust as high as 15 mph.Wednesday Night 2025-06-25, Chance T-storms then Mostly Clear. 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 80.
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 82.
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 76.