Expires:202601011800;;603257 FPUS53 KFSD 011042 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 440 AM CST Thu Jan 1 2026 IAZ001-011800- Lyon- Including the cities of Rock Rapids, George, Inwood, and Larchwood 440 AM CST Thu Jan 1 2026 .TODAY...Partly sunny. Much cooler with highs in the upper 20s. Southeast winds around 5 mph, becoming southwest this afternoon. .TONIGHT...Mostly cloudy. Cold with lows around 15. Northeast winds around 5 mph. .FRIDAY...Mostly cloudy. A slight chance of freezing rain and snow in the afternoon. Highs in the mid 20s. East winds around 5 mph. Chance of precipitation 20 percent. .FRIDAY NIGHT...Mostly cloudy. Near steady temperature in the lower 20s. Southeast winds around 5 mph. .SATURDAY...Mostly sunny. Highs in the lower 30s. South winds around 5 mph, becoming west around 5 mph in the afternoon. .SATURDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows around 20. .SUNDAY...Mostly cloudy in the morning, then becoming partly sunny. Highs in the upper 30s. .SUNDAY NIGHT...Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 20s. .MONDAY...Partly sunny. Highs in the lower 40s. .MONDAY NIGHT...Mostly cloudy. Lows in the upper 20s. .TUESDAY...Mostly sunny. Highs in the mid 40s. .TUESDAY NIGHT...Mostly cloudy. Lows in the mid 20s. .WEDNESDAY...Mostly sunny. Highs in the lower 40s. $$