Expires:202512210600;;939577 FPUS53 KFSD 202258 ZFPFSD Zone Forecasts for SE South Dakota/NW Iowa/SW Minnesota National Weather Service Sioux Falls SD 455 PM CST Sat Dec 20 2025 IAZ013-210600- O'Brien- Including the cities of Sheldon, Hartley, and Sanborn 455 PM CST Sat Dec 20 2025 .TONIGHT...Mostly clear. Much colder with lows around 12. Northwest winds 5 to 10 mph, becoming southeast after midnight. .SUNDAY...Sunny. Highs in the upper 30s. South winds 10 to 15 mph with gusts up to 25 mph. .SUNDAY NIGHT...Mostly cloudy. Not as cool with lows in the upper 20s. South winds around 15 mph with gusts up to 25 mph. .MONDAY...Partly sunny. Highs in the mid 40s. South winds 10 to 15 mph with gusts up to 25 mph. .MONDAY NIGHT...Partly cloudy. Lows in the upper 20s. West winds 5 to 10 mph, becoming northwest after midnight. .TUESDAY...Partly sunny. Highs in the upper 30s. .TUESDAY NIGHT...Mostly cloudy. Near steady temperature around 30. .WEDNESDAY...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. Highs in the lower 40s. .FRIDAY NIGHT...Mostly cloudy. Lows in the lower 20s. .SATURDAY...Sunny. Highs in the upper 30s. $$