Sioux Falls, S.D. – South Dakota starts October under summerlike heat, with Sioux Falls expected to push 90°F on Wednesday, making outdoor safety a priority. Drivers along I-29 should prepare for glare and gusty winds through midweek as unseasonable warmth grips the region.
According to the National Weather Service, Sioux Falls will see highs near 85°F Wednesday and up to 90°F again Friday before changes arrive. Winds could gust to 30 mph, creating challenges for high-profile vehicles on major corridors, including I-90 and Highway 42.
The stretch of sunny, dry weather brings opportunity for outdoor activities, but it also carries safety risks. Hydrate frequently, limit strenuous work in direct sun, and check on vulnerable neighbors. Farmers and construction crews in Minnehaha County will face above-normal heat through Friday, with no rain relief until the weekend.
Thursday looks especially hot, climbing to 88°F under clear skies. By Friday, forecasters expect another surge to 90°F, unusual for early October. Relief could arrive Saturday, when a 30% chance of showers enters the picture. Storm chances will continue into Sunday, breaking the extended dry pattern.
For now, South Dakota leans on a rare stretch of October sun, but shifting weather this weekend could affect travel and outdoor plans. Weather alerts may be issued if storms develop, especially along major travel routes.
Five-Day Forecast for Sioux Falls, S.D.
- Wednesday: Sunny, high near 85°F. Gusts up to 30 mph.
- Thursday: Sunny, high near 88°F.
- Friday: Sunny, high near 90°F.
- Saturday: 30% chance of showers, high near 80°F.
- Sunday: 30% chance of showers, high near 78°F.
