Weather
Sioux Falls, SD Weather: Gradual Heat Relief for Labor Day Sept. 7
Expect a gradual cooling trend in Sioux Falls this Labor Day. Get the latest forecast, including potential storms and travel impacts for Sept 7 weekend.
By Blake Harrison · 2026-09-04T04:25:54.118Z
Sioux Falls, SD — South Dakota residents should prepare for a gradual transition in conditions as we look toward the Labor Day holiday. While the region remains under the influence of summer heat through the weekend, a shift in the pattern begins to take hold by Monday, September 7. Meteorologists are now tracking a series of atmospheric disturbances that will bring moisture back into the area, offering a slight break from the peak heat experienced earlier in the week.
As you plan your holiday activities, keep in mind that the weather pattern through the weekend remains unsettled. By Monday, daytime highs are expected to retreat to near 90°F. While this remains quite warm, it marks a noticeable change from the sweltering 96°F heat indices seen previously. Humidity will remain a significant factor, so stay hydrated if you are heading outdoors for cookouts or community gatherings.
Travelers using I 29 or I 90 should stay alert for fluctuating conditions. Current models indicate that shower and thunderstorm activity could impact roadway visibility at various times throughout the day on Monday. The chance for precipitation remains present from the early morning hours through the afternoon, which could lead to slick spots and slowed traffic flow during peak holiday travel periods. Always allow extra time to reach your destination safely if you encounter rain.
The atmosphere over the Plains is keeping things dynamic. You may notice increased cloud cover by Monday night as the chance for storms continues into the early part of the week. While severe weather is not currently highlighted in the latest data, the presence of thunderstorms means conditions can change rapidly. Monitor local updates frequently if you are planning to spend the entire day outside.
The shift toward slightly lower temperatures by mid week suggests a move toward more comfortable late summer weather. However, for those heading out for the holiday on Monday, the mix of sun and clouds will provide a quintessential summer feel. Ensure your outdoor plans include a sheltered location just in case those isolated storm cells develop in your immediate area.
Traveling this weekend? Tell us what conditions you are seeing on your drive.
For the latest hyperlocal forecast, radar, and active alerts for Sioux Falls, visit the National Weather Service Sioux Falls page .
Saturday: Chance Showers/Thunderstorms, High 96/Low 72 Sunday: Slight Chance Showers/Thunderstorms, High 91/Low 70 Labor Day: Chance Showers/Thunderstorms, High 90/Low 72 Tuesday: Chance Showers/Thunderstorms, High 90/Low 65 Wednesday: Slight Chance Rain Showers, High 87/Low 62 Have something happening in your community? Hit the red Post/Submit button above to share events, classifieds, stories and local updates with Country Herald. SUPPORT LOCAL INDEPENDENT NEWS! Have a tip? Message us!