SIOUX FALLS SiouxFallsWeather.com

Tuesday, August 18, 2026

Zone Forecast Product

.OVERNIGHT...Mostly cloudy. Lows around 60. Northeast winds around 5 mph. .WEDNESDAY...Mostly cloudy in the morning, then becoming mostly sunny. A slight chance of thunderstorms. A chance of showers, mainly in the morning. Highs in the upper 70s. Southeast winds 5 to 10 mph, becoming southwest in the afternoon. Chance of rain 50 percent. .WEDNESDAY NIGHT...Mostly clear. Lows around 60. South winds 5 to 10 mph. .THURSDAY...Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. South winds 10 to 15 mph. Chance of rain 20 percent. .THURSDAY NIGHT...Mostly clear. A slight chance of showers and thunderstorms in the evening. Humid with lows in the lower 60s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. .FRIDAY...Sunny. Highs in the mid 80s. .FRIDAY NIGHT...Mostly clear. Lows around 60. .SATURDAY...Mostly sunny. Highs in the lower 80s. .SATURDAY NIGHT...Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 50s. .SUNDAY...Mostly cloudy. Highs in the upper 70s. .SUNDAY NIGHT...Partly cloudy. Lows in the lower 60s. .MONDAY...Mostly cloudy in the morning, then clearing. Highs in the lower 80s. .MONDAY NIGHT...Mostly clear. Lows in the lower 60s. .TUESDAY...Mostly sunny. Highs in the mid 80s. -- This email has been checked for viruses by AVG antivirus software. www.avg.com