| NWS Forecast for: O'Brien County Issued by: National Weather Service Sioux Falls, SD Last Update: 754 AM CDT Fri Jul 24 2026 |  |
Today: Mostly cloudy. A slight chance of showers this morning. Highs around 80. South winds 10 to 15 mph. Chance of rain 20 percent. Tonight: Partly cloudy in the evening, then becoming mostly cloudy. Patchy fog after midnight. Humid with lows in the mid 60s. South winds around 10 mph. Saturday: Patchy fog in the morning. Mostly sunny. Warmer with highs in the lower 90s. Southwest winds 5 to 10 mph. Heat index values up to 103 in the afternoon. Saturday Night: Partly cloudy. Humid with lows in the lower 70s. Southwest winds 5 to 10 mph. Heat index values up to 102 early in the evening. Sunday: Mostly sunny. Humid with highs in the mid 90s. Southwest winds 10 to 15 mph. Heat index values up to 103 in the afternoon. Sunday Night: Mostly clear with a slight chance of showers and thunderstorms. Lows in the lower 70s. Chance of rain 20 percent. Heat index values up to 105 early in the evening. Monday: Sunny, hot with highs in the upper 90s. Monday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. Heat index values in the upper 90s early in the evening. Tuesday: Mostly sunny. Highs in the lower 90s. Tuesday Night: Mostly clear. Lows in the upper 60s. Wednesday: Mostly sunny. Highs in the lower 90s. Wednesday Night: Partly cloudy. Lows in the upper 60s. Thursday: Mostly sunny. Highs in the lower 90s. Heat index values in the upper 90s in the afternoon. | |
| Zone Forecast: O'Brien County | |
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