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
72°F
Chance Showers And Thunderstorms then Patchy Smoke
A chance of showers and thunderstorms before 7am, then patchy smoke and a chance of showers and thunderstorms between 7am and noon, then patchy smoke and showers and thunderstorms likely between noon and 3pm, then patchy smoke and a chance of showers and thunderstorms between 3pm and 4pm, then showers and thunderstorms likely between 4pm and 5pm, then patchy smoke and a chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for South Sioux City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Chance Showers And Thunderstorms then Patchy Smoke | 5 to 15 mph N | 72% |
| Tonight | 57°F | Patchy Smoke | 0 to 5 mph NNE | 50% |
| Wednesday | 76°F | Partly Sunny | 0 to 5 mph E | 6% |
| Wednesday Night | 54°F | Mostly Clear | 0 to 5 mph SSE | 1% |
| Thursday | 81°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Thursday Night | 63°F | Mostly Clear | 5 to 10 mph S | 1% |
| Friday | 87°F | Sunny | 5 to 10 mph S | 3% |
| Friday Night | 66°F | Mostly Clear | 5 to 10 mph S | 11% |
| Saturday | 91°F | Sunny | 5 to 15 mph S | 4% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SSE | 15% |
| Sunday | 90°F | Mostly Sunny | 5 to 10 mph SE | 14% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 to 15 mph SE | 17% |
| Monday | 90°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph E | 17% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 20% |
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 Aug 4, 2026.