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.
This Afternoon
56°F
Rain Showers
Rain showers. Cloudy. High near 56, with temperatures falling to around 49 in the afternoon. North northwest wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for South Sioux City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Rain Showers | 20 mph NNW | 92% |
| Tonight | 39°F | Rain Showers | 15 mph NW | 82% |
| Wednesday | 49°F | Chance Rain Showers | 15 mph NW | 38% |
| Wednesday Night | 37°F | Chance Rain Showers | 10 to 15 mph NW | 49% |
| Thursday | 50°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NNW | 25% |
| Thursday Night | 33°F | Mostly Cloudy | 5 to 10 mph N | 1% |
| Friday | 50°F | Partly Sunny | 0 to 5 mph NNE | 0% |
| Friday Night | 32°F | Mostly Cloudy | 0 mph | 0% |
| Saturday | 59°F | Mostly Sunny | 0 to 5 mph SW | 2% |
| Saturday Night | 36°F | Mostly Clear | 5 mph W | 5% |
| Sunday | 61°F | Sunny | 5 mph WSW | 2% |
| Sunday Night | 39°F | Mostly Clear | 5 mph S | 0% |
| Monday | 64°F | Sunny | 5 to 10 mph WSW | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph NW | 0% |
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 Nov 3, 2026.