| NWS Forecast for: South Sioux Issued by: National Weather Service Cheyenne, WY Last Update: 1233 PM MDT Mon Sep 21 2026 | |
| This Afternoon: Mostly sunny. Highs in the upper 60s. Northeast winds 5 to 10 mph. Tonight: Mostly clear in the evening, then becoming mostly cloudy. Lows in the lower 50s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Tuesday: Mostly cloudy in the morning, then becoming mostly sunny. Highs in the upper 60s. Southeast winds 15 to 20 mph with gusts up to 30 mph. Tuesday Night: Mostly clear in the evening, then becoming mostly cloudy. Lows in the lower 50s. Southeast winds 15 to 20 mph with gusts up to 35 mph. Wednesday: Partly sunny. Warmer with highs in the upper 70s. South winds 10 to 15 mph. Wednesday Night And Thursday: Mostly cloudy. Lows around 50. Highs in the mid 70s. Thursday Night: Partly cloudy. A chance of showers after midnight. Lows in the upper 40s. Chance of rain 30 percent. Friday And Friday Night: Partly cloudy. Highs in the upper 70s. Lows in the lower 50s. Saturday And Saturday Night: Mostly clear. Highs in the lower 80s. Lows in the lower 50s. Sunday: Mostly sunny. Highs in the upper 70s. | |
| Zone Forecast: South Sioux | |
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