Expires:202605181200;;747089 FPUS53 KFSD 180445 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 1144 PM CDT Sun May 17 2026 IAZ012-181200- Sioux- Including the cities of Sioux Center, Orange City, Rock Valley, Hawarden, and Hull 1144 PM CDT Sun May 17 2026 .OVERNIGHT...Cloudy. A chance of showers with a slight chance of thunderstorms late this evening, then a chance of thunderstorms. Some thunderstorms may be severe. Lows in the upper 40s. West winds 10 to 15 mph, becoming northwest. Chance of rain 40 percent. .MONDAY...Cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Cooler with highs in the mid 60s. North winds 5 to 10 mph, becoming northeast in the afternoon. Chance of rain 50 percent. .MONDAY NIGHT...Showers with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the lower 40s. North winds 15 to 20 mph. Chance of rain 90 percent. .TUESDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 50s. Northwest winds 15 to 20 mph. .TUESDAY NIGHT...Partly cloudy in the evening, then clearing. Lows in the mid 30s. Northwest winds 10 to 15 mph with gusts up to 25 mph, becoming north around 5 mph after midnight. .WEDNESDAY...Mostly sunny. Highs in the lower 60s. .WEDNESDAY NIGHT...Mostly cloudy in the evening, then becoming partly cloudy. Lows in the lower 40s. .THURSDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 60s. .THURSDAY NIGHT...Mostly cloudy. A chance of showers after midnight. Lows in the mid 40s. Chance of rain 30 percent. .FRIDAY...Mostly cloudy in the morning, then becoming mostly sunny. Highs in the lower 70s. .FRIDAY NIGHT...Mostly cloudy with a chance of showers. Lows in the upper 40s. Chance of rain 40 percent. .SATURDAY...Mostly cloudy in the morning, then mostly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 40 percent. .SATURDAY NIGHT...Partly cloudy. Lows in the lower 50s. .SUNDAY...Mostly sunny. Highs in the mid 80s. $$