| NWS Forecast for: O'Brien County Issued by: National Weather Service Sioux Falls, SD Last Update: 149 PM CDT Thu Jul 23 2026 | |
This Afternoon: Partly sunny. Near steady temperature in the upper 70s. South winds 5 to 10 mph. Tonight: Showers. Lows around 60. South winds 5 to 10 mph. Chance of rain 90 percent. Friday: Mostly cloudy. Scattered showers in the morning. Humid with highs in the upper 70s. South winds 10 to 15 mph. Chance of rain 40 percent. Friday Night: Mostly cloudy. Humid with lows in the mid 60s. South winds around 10 mph. Saturday: Partly sunny in the morning, then clearing. Much warmer. Humid with highs in the mid 90s. Southwest winds 5 to 10 mph. Heat index values up to 103 in the afternoon. Saturday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the lower 70s. Heat index values up to 105 early in the evening. Sunday: Mostly sunny. Hot with highs in the mid 90s. Heat index values up to 105 in the afternoon. Sunday Night: Mostly clear. Lows in the lower 70s. Heat index values up to 105 early in the evening. Monday: Sunny, hot with highs in the mid 90s. Monday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. Heat index values up to 100 early in the evening. Tuesday: Mostly sunny. Highs in the lower 90s. Tuesday Night: Partly cloudy. Lows in the mid 60s. Wednesday: Mostly sunny. Highs in the lower 90s. | |
| Zone Forecast: O'Brien County | |
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