I-90 weather conditions near Rapid City Weather, South Dakota
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fair 79°F 2025-08-18T19:52:00-06:00
Tonight 2025-08-18, Mostly Clear. Mostly clear, with a low around 64. North wind around 5 mph becoming southwest after midnight.
Tuesday 2025-08-19, Sunny. Sunny, with a high near 92. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night 2025-08-19, Mostly Clear. Mostly clear, with a low around 67. Southeast wind 5 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.
Wednesday 2025-08-20, Sunny. Sunny, with a high near 94. South wind 5 to 15 mph, with gusts as high as 30 mph.
Wednesday Night 2025-08-20, Mostly Clear. Mostly clear, with a low around 70. Southeast wind 10 to 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph.
Thursday 2025-08-21, Sunny. Sunny, with a high near 89. Southwest wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 30 mph.
Thursday Night 2025-08-21, Slight Chance T-storms then Chance Showers. A 40 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 61. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Friday 2025-08-22, Chance Showers then Chance T-storms. A chance of showers and thunderstorms. Mostly sunny, with a high near 78. Northwest wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Friday Night 2025-08-22, Chance T-storms then Chance Showers. A chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Saturday 2025-08-23, Slight Chance Showers then Chance T-storms. A slight chance of showers, then a chance of showers and thunderstorms after noon. Sunny, with a high near 77.
Saturday Night 2025-08-23, Slight Chance T-storms then Slight Chance Showers. A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Sunday 2025-08-24, Mostly Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Sunday Night 2025-08-24, Slight Chance T-storms then Slight Chance Showers. A slight chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Monday 2025-08-25, Mostly Sunny then Chance T-storms. A chance of showers and thunderstorms. Mostly sunny, with a high near 78.
Current condition: Fair 79°F 2025-08-18T19:52:00-06:00 
Tonight 2025-08-18, Mostly Clear. Mostly clear, with a low around 64. North wind around 5 mph becoming southwest after midnight.
Tuesday 2025-08-19, Sunny. Sunny, with a high near 92. Light and variable wind becoming east 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Wednesday 2025-08-20, Sunny. Sunny, with a high near 94. South wind 5 to 15 mph, with gusts as high as 30 mph.Thursday Night 2025-08-21, Slight Chance T-storms then Chance Showers. A 40 percent chance of showers and thunderstorms, mainly after midnight. Partly cloudy, with a low around 61. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Friday 2025-08-22, Chance Showers then Chance T-storms. A chance of showers and thunderstorms. Mostly sunny, with a high near 78. Northwest wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 20 mph.
Friday Night 2025-08-22, Chance T-storms then Chance Showers. A chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Sunday 2025-08-24, Mostly Sunny then Slight Chance T-storms. A slight chance of showers and thunderstorms. Mostly sunny, with a high near 76.
Sunday Night 2025-08-24, Slight Chance T-storms then Slight Chance Showers. A slight chance of showers and thunderstorms. Partly cloudy, with a low around 55.