Expires:202512211200;;950368 FPUS53 KFSD 210417 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 1015 PM CST Sat Dec 20 2025 SDZ069-211200- Yankton- Including the city of Yankton 1015 PM CST Sat Dec 20 2025 .OVERNIGHT...Mostly clear. Cooler with lows around 20. Southeast winds 5 to 10 mph. .SUNDAY...Mostly sunny. Highs in the mid 40s. South winds 10 to 15 mph with gusts up to 25 mph. .SUNDAY NIGHT...Mostly cloudy. Not as cool with lows in the lower 30s. South winds 10 to 15 mph. .MONDAY...Mostly sunny. Not as cool with highs in the mid 50s. Southwest winds 10 to 15 mph. .MONDAY NIGHT...Partly cloudy. Lows in the upper 20s. Northwest winds 5 to 10 mph. .TUESDAY...Partly sunny in the morning, then becoming mostly cloudy. Cooler with highs in the lower 40s. .TUESDAY NIGHT...Mostly cloudy. Near steady temperature in the mid 30s. .WEDNESDAY...Mostly cloudy in the morning, then clearing. Not as cool with highs in the lower 50s. .WEDNESDAY NIGHT...Partly cloudy. Lows in the upper 30s. .CHRISTMAS DAY...Mostly sunny. Highs in the upper 50s. .THURSDAY NIGHT...Mostly cloudy. Lows around 30. .FRIDAY...Partly sunny. Cooler with highs in the upper 40s. .FRIDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 20s. .SATURDAY...Mostly sunny. Highs around 40. $$