Thu Feb 20 09:58:10 AM EST 2025 Sioux- Including the city of Fort Yates 857 AM CST Thu Feb 20 2025 ...EXTREME COLD WARNING IN EFFECT UNTIL NOON CST TODAY... .TODAY...Sunny. Highs around 10. Southeast winds 5 to 10 mph, becoming south around 15 mph in the afternoon. Wind chills around 45 below in the morning. .TONIGHT...Mostly clear. Not as cold. Lows around 5 below. South winds 10 to 15 mph. Wind chills around 20 below. .FRIDAY...Mostly sunny. Not as cold. Highs in the lower 30s. Southwest winds 5 to 10 mph. Wind chills around 20 below in the morning. .FRIDAY NIGHT...Partly cloudy. Not as cold. Lows 10 to 15. Southwest winds 5 to 10 mph. .SATURDAY...Partly sunny. Highs in the lower 40s. West winds 5 to 10 mph. .SATURDAY NIGHT...Mostly clear. Lows in the mid 20s. .SUNDAY...Partly sunny. Highs in the upper 40s. .SUNDAY NIGHT...Partly cloudy. Lows in the lower 30s. .MONDAY...Mostly sunny. Highs in the lower 50s. .MONDAY NIGHT...Partly cloudy. Lows in the upper 20s. .TUESDAY...Mostly sunny. A slight chance of rain in the afternoon. Highs in the lower 50s. Chance of rain 20 percent. .TUESDAY NIGHT...Mostly cloudy with a 30 percent chance of rain. Lows in the upper 20s. .WEDNESDAY...Partly sunny with a 20 percent chance of rain. Highs in the mid 40s.