Sioux Falls, S.D. – Temperatures dipped near 40°F Sunday morning, bringing patchy frost to parts of southeastern South Dakota. That chilly start sets the stage for a week that quickly turns stormy, with thunderstorms possible as early as Monday afternoon.
According to the National Weather Service, a Frost Advisory is not currently in place, but conditions were cold enough early Sunday for sensitive plants to be at risk in low-lying areas. By Monday, highs will rebound to near 80°F under partly sunny skies before storm chances arrive late in the day.
The Hazardous Weather Outlook calls for thunderstorms Monday afternoon into evening, with some storms capable of producing strong winds, hail, and heavy rainfall. Additional thunderstorm chances return later in the week, though Tuesday should bring calmer weather once early clouds clear.
Drivers along I-29 and I-90 should prepare for rapidly changing conditions Monday night, including gusty winds up to 25 mph and reduced visibility in heavier downpours. Outdoor activities should be wrapped up by early evening, and residents are urged to secure loose objects ahead of storms.
The NOAA long-range outlook trends drier overall for the Upper Midwest, but any single storm could still bring locally severe impacts. Residents should monitor updates Monday afternoon and evening in case watches or warnings are issued.
Five-Day Forecast for Sioux Falls, South Dakota
- Monday: Partly sunny, high 80°F, storms possible late
- Tuesday: Cloudy early, then sunny, high 81°F
- Wednesday: Mostly sunny, high 83°F, light winds
- Thursday: Partly sunny, high 84°F, warm afternoon
- Friday: Mostly sunny, high 83°F, mild evening
