Sioux Falls, South Dakota – Thunderstorms could develop over Sioux Falls by early Friday afternoon, with a 60% chance of rain threatening outdoor plans and afternoon travel on I-229.
According to the National Weather Service in Sioux Falls, showers and possible thunderstorms are expected after 1 p.m. Friday. East winds will shift westward by evening at 5 to 10 mph. While severe weather isn’t anticipated, lightning and heavy downpours could cause delays and slick roadways during peak afternoon hours.
Drivers should use caution on I-229 and local streets if storms develop, especially during the evening commute. Temperatures will reach 86°F Friday before dropping to 61°F overnight under mostly cloudy skies.
The weekend turns brighter. Saturday will be sunny and dry, topping out near 82°F. Sunday brings more sun and a warmer high of 88°F — ideal for outdoor activities, but residents should stay hydrated during peak afternoon heat.
The heat intensifies Monday, with a high near 91°F in Sioux Falls. Thunderstorm chances return Monday night (30%) and Tuesday (30–40%), potentially disrupting early-week plans. Lows will sit in the 60s through the weekend, then dip to 59°F Tuesday night.
Expect mostly sunny skies Wednesday with a cooler high of 75°F. A perfect break from the heat if you’re scheduling yard work or outdoor errands midweek.
More updates are expected if storm risks increase Friday or into next week.
🌤️ Sioux Falls Five-Day Forecast: July 11–15
- Friday: Showers and thunderstorms likely after 1 p.m. | High: 86°F
- Saturday: Sunny | High: 82°F | Low: 60°F
- Sunday: Sunny | High: 88°F | Low: 66°F
- Monday: Sunny and hot | High: 91°F | Low: 67°F
- Tuesday: 30% chance of thunderstorms | High: 85°F | Low: 59°F
