| NWS Forecast for: South Sioux Issued by: National Weather Service Cheyenne, WY Last Update: 1223 PM MDT Fri May 1 2026 |  |
| This Afternoon: Sunny. Highs in the lower 60s. North winds 10 to 15 mph with gusts up to 25 mph. Tonight: Mostly clear. Cold with lows in the lower 30s. Northeast winds 10 to 15 mph, becoming south around 5 mph after midnight. Saturday: Sunny, warmer with highs in the lower 70s. West winds 10 to 15 mph. Saturday Night: Mostly clear. Lows in the upper 30s. North winds 5 to 10 mph, becoming northeast after midnight. Sunday: Mostly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph with gusts up to 20 mph. Sunday Night: Partly cloudy. Lows around 40. Monday: Mostly sunny. A chance of showers in the afternoon. Highs in the upper 60s. Chance of rain 40 percent. Monday Night: Rain showers likely. Snow showers likely after midnight. Little or no snow accumulation. Lows in the mid 30s. Chance of precipitation 70 percent. Tuesday: Mostly cloudy with a chance of snow showers. Rain showers likely, mainly in the morning. Little or no snow accumulation. Much cooler with highs in the lower 50s. Chance of precipitation 60 percent. Tuesday Night: Mostly cloudy with a chance of rain and snow showers. Cold with lows in the upper 20s. Chance of precipitation 50 percent. Wednesday: Partly sunny with a chance of snow and rain showers. Highs in the mid 50s. Chance of precipitation 40 percent. Wednesday Night And Thursday: Partly cloudy. Lows in the lower 30s. Highs in the upper 60s. | |
| Zone Forecast: South Sioux | |
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