Weather
South Dakota Weather: Unseasonable 70s Continue Through Oct. 22
Sioux Falls, SD – An unusually warm stretch of October weather is expected to bring afternoon temperatures into the mid 70s across southeastern South Dakota this week, with highs potentially reaching
By Erin Vale · 2026-10-19T10:29:29.115Z
Sioux Falls, SD – An unusually warm stretch of October weather is expected to bring afternoon temperatures into the mid 70s across southeastern South Dakota this week, with highs potentially reaching 76 degrees Wednesday, Oct. 21, as temperatures climb as much as 20 degrees above seasonal averages.
According to the National Weather Service in Sioux Falls, warm, dry and periodically breezy conditions will continue through Thursday, Oct. 22, providing several days of above normal temperatures across the region.
The agency's Monday, Oct. 19, forecast indicates afternoon highs ranging from 65 to 68 degrees, with overnight lows between 43 and 45 degrees.
Tuesday, Oct. 20, will bring another noticeable warmup , with highs climbing to 68 to 72 degrees. Overnight temperatures are expected to remain relatively mild, ranging from 46 to 51 degrees.
By Wednesday, Oct. 21, temperatures could reach their highest levels of the week, with afternoon readings between 72 and 76 degrees under mostly sunny skies.
That would place temperatures approximately 10 to 20 degrees above normal for mid to late October, when average highs are typically in the upper 50s.
The warmer pattern continues Thursday, Oct. 22, with forecast highs ranging from 71 to 76 degrees and overnight lows between 54 and 58 degrees.
While the weather will remain generally favorable for outdoor activities, occasional breezy conditions are expected, particularly Tuesday and Thursday.
The extended dry stretch could also affect outdoor burning conditions, although the weather service has not identified a specific fire weather warning in its latest briefing.
For residents across Sioux Falls in Minnehaha County and surrounding southeastern South Dakota communities, the forecast offers several afternoons of unusually mild autumn weather before any potential changes later in the week.
No significant rainfall is indicated in the Monday through Thursday outlook.
Residents should continue monitoring updated forecasts as the week progresses, particularly for changes in wind conditions and temperatures.