| NWS Forecast for: Plymouth County Issued by: National Weather Service Sioux Falls, SD Last Update: 1124 AM CDT Sat Aug 29 2026 | |
This Afternoon: Mostly sunny. Highs around 90. South winds 15 to 20 mph with gusts up to 30 mph. Tonight: Partly cloudy in the evening, then becoming mostly cloudy. Humid with lows in the lower 70s. South winds 5 to 10 mph. Sunday: Partly sunny in the morning, then clearing. Humid with highs in the lower 90s. South winds 5 to 10 mph. Heat index values in the upper 90s. Sunday Night: Mostly clear in the evening, then becoming partly cloudy. Humid with lows in the lower 70s. South winds 5 to 10 mph. Monday: Partly sunny with a 20 percent chance of showers. Humid with highs in the upper 80s. West winds around 5 mph. Monday Night: Mostly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the upper 60s. Chance of rain 20 percent. Tuesday: Mostly cloudy in the morning, then becoming mostly sunny. Highs in the upper 80s. Tuesday Night: A chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the mid 60s. Chance of rain 50 percent. Wednesday: Mostly sunny. Highs in the upper 80s. Wednesday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. Thursday: Mostly sunny. Highs in the upper 80s. Thursday Night: Partly cloudy. Lows in the upper 60s. Friday: Mostly sunny. Highs in the upper 80s. | |
| Zone Forecast: Plymouth County | |
Visit your local NWS office at: https://www.weather.gov/fsd/ |