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: Mostly Cloudy 73°F 2025-06-29T10:35:00-06:00 
Today 2025-06-29, Severe Thunderstorms. Showers and thunderstorms likely, mainly after 3pm. Some of the storms could be severe. Partly sunny, with a high near 72. North wind 5 to 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%.Tonight 2025-06-29, Slight Chance T-storms then Mostly Clear. A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 53. North wind around 5 mph becoming southwest in the evening.
Monday 2025-06-30, Sunny. Sunny, with a high near 77. Southwest wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.
Monday Night 2025-06-30, Mostly Clear. Mostly clear, with a low around 57. East wind around 5 mph becoming south after midnight.- Tuesday 2025-07-01, Sunny. Sunny, with a high near 86. South wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
- Tuesday Night 2025-07-01, Mostly Clear. Mostly clear, with a low around 62. East wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
- Wednesday 2025-07-02, Sunny. Sunny, with a high near 88. Southwest wind 5 to 10 mph becoming east in the morning. Winds could gust as high as 20 mph.
Wednesday Night 2025-07-02, Slight Chance T-storms then Partly Cloudy. A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 64. South wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday 2025-07-03, Mostly Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 88.
Thursday Night 2025-07-03, Chance T-storms then Chance Showers. A chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Independence Day 2025-07-04, Partly Sunny then Chance T-storms. A chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Friday Night 2025-07-04, Chance T-storms then Chance Showers. A chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Saturday 2025-07-05, Slight Chance Showers then Chance T-storms. A chance of showers and thunderstorms. Mostly sunny, with a high near 80.