Expires:202512270200;;269950 FPUS53 KFSD 261852 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 1250 PM CST Fri Dec 26 2025 SDZ056-270200- Moody- Including the city of Flandreau 1250 PM CST Fri Dec 26 2025 .THIS AFTERNOON...Mostly sunny. Highs around 40. South winds around 5 mph. .TONIGHT...Mostly cloudy. Areas of fog. Near steady temperature in the mid 30s. South winds 10 to 15 mph. .SATURDAY...Mostly cloudy in the morning, then becoming partly sunny. Patchy fog in the morning. Highs in the upper 40s. South winds 10 to 15 mph. .SATURDAY NIGHT...Mostly cloudy and breezy. Much cooler with lows around 15. Northwest winds 5 to 10 mph with gusts up to 20 mph, increasing to north 20 to 25 mph with gusts up to 35 mph after midnight. .SUNDAY...Mostly cloudy. A chance of snow, mainly in the morning. Little or no snow accumulation. Windy and much cooler with highs in the lower 20s. Temperature falling to around 14 in the afternoon. Northwest winds 20 to 30 mph with gusts up to 40 mph. Chance of snow 30 percent. .SUNDAY NIGHT...Mostly cloudy and breezy, colder with lows zero to 5 above zero. Wind chill values as low as 15 below. .MONDAY...Sunny. Highs 15 to 20. Wind chill values as low as 15 below in the morning. .MONDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Cold with lows around 10 above. Temperature rising to around 15 after midnight. .TUESDAY...Partly sunny. Not as cool with highs in the mid 30s. .TUESDAY NIGHT...Mostly cloudy. Cold with lows around 10 above. .WEDNESDAY...Mostly cloudy. A slight chance of snow in the morning. Cooler with highs in the lower 20s. Chance of snow 20 percent. .WEDNESDAY NIGHT...Mostly cloudy. Cold with lows around 5 above. .NEW YEARS DAY...Mostly sunny. Highs around 20. $$