South Sioux City, NE Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Sioux City, a city in Dakota County, Nebraska.
Today
71°F
Chance Rain Showers then Cloudy
A chance of rain showers before 9am. Cloudy. High near 71, with temperatures falling to around 68 in the afternoon. North northwest wind 5 to 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for South Sioux City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Chance Rain Showers then Cloudy | 5 to 10 mph NNW | 29% |
| Tonight | 58°F | Cloudy | 10 mph N | 14% |
| Sunday | 65°F | Cloudy then Chance Rain Showers | 10 mph NNE | 29% |
| Sunday Night | 54°F | Rain Showers Likely | 5 to 10 mph NE | 67% |
| Monday | 61°F | Rain Showers Likely | 5 to 10 mph ENE | 67% |
| Monday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 5 mph ENE | 35% |
| Tuesday | 63°F | Partly Sunny | 5 mph E | 6% |
| Tuesday Night | 46°F | Partly Cloudy | 5 mph ESE | 1% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph SE | 6% |
| Wednesday Night | 52°F | Partly Cloudy then Chance Rain Showers | 5 mph SE | 30% |
| Thursday | 67°F | Chance Rain Showers | 5 to 10 mph SE | 33% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 5 mph SE | 17% |
| Friday | 70°F | Slight Chance Rain Showers | 5 to 10 mph SE | 17% |
| Friday Night | 56°F | Mostly Cloudy then Chance Rain Showers | 5 mph SE | 25% |
Forecast source: National Weather Service (api.weather.gov) for South Sioux City (42.463, -96.413). Updated through the day.
Growing snapshot for South Sioux City
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5a
More local growing data for South Sioux City: nearby ZIP 68776 weather · frost dates · planting calendar · Nebraska frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Sioux City Ang, Ia (5.5 mi from South Sioux City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.