Expires:202512211200;;950403 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 IAZ001-211200- Lyon- Including the cities of Rock Rapids, George, Inwood, and Larchwood 1015 PM CST Sat Dec 20 2025 .OVERNIGHT...Mostly clear. Colder with lows around 14. Light and variable winds, becoming southeast around 5 mph. .SUNDAY...Mostly sunny. Highs in the upper 30s. South winds 10 to 15 mph. .SUNDAY NIGHT...Mostly cloudy. Not as cool with lows in the upper 20s. South winds 10 to 15 mph. .MONDAY...Partly sunny. Highs in the mid 40s. South winds 10 to 15 mph. .MONDAY NIGHT...Partly cloudy. Lows in the upper 20s. West winds 5 to 10 mph, becoming northwest after midnight. .TUESDAY...Partly sunny in the morning, then becoming mostly cloudy. Highs in the upper 30s. .TUESDAY NIGHT...Mostly cloudy. Near steady temperature in the lower 30s. .WEDNESDAY...Mostly cloudy. Highs in the mid 40s. .WEDNESDAY NIGHT...Mostly cloudy. Lows in the mid 30s. .CHRISTMAS DAY...Mostly sunny. Highs in the lower 50s. .THURSDAY NIGHT...Mostly cloudy. Lows in the mid 20s. .FRIDAY...Partly sunny. Cooler with highs in the lower 40s. .FRIDAY NIGHT...Mostly cloudy. Lows in the mid 20s. .SATURDAY...Sunny. Highs in the upper 30s. $$