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: Fair 61°F 2025-06-25T20:35:00-06:00 Tonight 2025-06-25, Isolated T-storms then Patchy Fog. Isolated showers and thunderstorms before 10pm. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 56. South wind around 5 mph. Chance of precipitation is 20%.
Thursday 2025-06-26, Patchy Fog then Mostly Sunny. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 81. Light and variable wind becoming southeast 5 to 10 mph in the morning. Winds could gust as high as 15 mph.
Thursday Night 2025-06-26, Partly Cloudy. Partly cloudy, with a low around 62. Southeast wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.
Friday 2025-06-27, Sunny. Sunny, with a high near 88. Southwest wind 5 to 10 mph becoming north in the afternoon. Winds could gust as high as 15 mph.
Friday Night 2025-06-27, Mostly Clear. Mostly clear, with a low around 61. North wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 15 mph.- Saturday 2025-06-28, Sunny. Sunny, with a high near 85. Southwest wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Saturday Night 2025-06-28, Chance T-storms then Showers Likely. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 58. Northeast wind 5 to 10 mph becoming southwest in the evening. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Sunday 2025-06-29, Showers Likely. A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Mostly sunny, with a high near 77. West wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.
Sunday Night 2025-06-29, Chance T-storms. A chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 57.- Monday 2025-06-30, Sunny. Sunny, with a high near 80.
Monday Night 2025-06-30, Slight Chance T-storms then Partly Cloudy. A slight chance of showers and thunderstorms. Partly cloudy, with a low around 59.
Tuesday 2025-07-01, Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms. Sunny, with a high near 83.
- Tuesday Night 2025-07-01, Slight Chance T-storms. A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61.