Fri Feb 21 05:00:51 PM EST 2025 Northern Sioux County- Including the city of Harrison 259 PM MST Fri Feb 21 2025 .TONIGHT...Mostly clear. Not as cold with lows 12 to 20. West winds 10 to 15 mph. .SATURDAY...Mostly sunny. Highs in the upper 40s. West winds 10 to 15 mph. .SATURDAY NIGHT...Partly cloudy in the evening, then clearing. Cold with lows in the mid 20s. West winds 10 to 15 mph with gusts up to 30 mph. .SUNDAY...Sunny, breezy with highs in the upper 50s. West winds 15 to 25 mph with gusts up to 40 mph. .SUNDAY NIGHT...Partly cloudy and breezy. Lows in the mid 30s. West winds 15 to 25 mph with gusts up to 40 mph. .MONDAY...Mostly sunny and windy. Highs in the upper 50s. .MONDAY NIGHT...Mostly clear. Cold with lows in the upper 20s. .TUESDAY AND TUESDAY NIGHT...Partly cloudy and very windy. Highs in the lower 60s. Lows in the upper 20s. .WEDNESDAY...Mostly sunny and windy. Much cooler with highs in the mid 40s. .WEDNESDAY NIGHT AND THURSDAY...Mostly clear. Lows in the lower 20s. Highs in the mid 50s. .THURSDAY NIGHT...Mostly clear. Cold with lows in the upper 20s. .FRIDAY...Mostly sunny and breezy. Highs in the mid 50s.