| NWS Forecast for: South Sioux Issued by: National Weather Service Cheyenne, WY Last Update: 1233 PM MDT Tue Aug 4 2026 | |
| This Afternoon: Partly sunny. Patchy smoke. Not as warm with highs in the lower 70s. East winds 5 to 10 mph with gusts up to 20 mph. Tonight: Partly cloudy with a slight chance of showers. Patchy smoke. A slight chance of thunderstorms after midnight. Lows around 50. Southeast winds 10 to 15 mph. Chance of rain 20 percent. Wednesday: Mostly sunny. Patchy smoke. Highs in the lower 80s. Southeast winds 5 to 10 mph. Wednesday Night: Patchy smoke in the evening. Partly cloudy. Lows in the mid 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Thursday: Sunny, warmer with highs in the mid 90s. Southwest winds 5 to 10 mph, becoming northwest in the afternoon. Thursday Night Through Saturday: Clear, hot. Lows around 60. Highs in the upper 90s. Saturday Night And Sunday: Mostly clear. Hot. Lows in the lower 60s. Highs around 100. Sunday Night: Partly cloudy. Lows in the mid 60s. Monday: Sunny, hot with highs in the mid 90s. | |
| Zone Forecast: South Sioux | |
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