South Sioux City, NE Weather & Growing Conditions
Tonight
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4am, then a chance of showers and thunderstorms. Mostly cloudy. Low around 66, with temperatures rising to around 70 overnight. Northwest wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 mph NW | 37% |
| Saturday | 72°F | Slight Chance Showers And Thunderstorms then Cloudy | 5 to 10 mph NNW | 23% |
| Saturday Night | 58°F | Slight Chance Rain Showers then Cloudy | 5 to 10 mph N | 16% |
| Sunday | 65°F | Chance Rain Showers | 10 mph NE | 52% |
| Sunday Night | 54°F | Rain Showers Likely | 5 to 10 mph ENE | 61% |
| Monday | 60°F | Showers And Thunderstorms Likely | 10 mph ENE | 66% |
| Monday Night | 50°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph ENE | 39% |
| Tuesday | 62°F | Mostly Cloudy | 5 mph E | 5% |
| Tuesday Night | 48°F | Partly Cloudy | 5 mph ESE | 0% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph SE | 10% |
| Wednesday Night | 52°F | Mostly Cloudy then Chance Rain Showers | 5 mph SE | 32% |
| Thursday | 66°F | Chance Rain Showers | 5 to 10 mph SSE | 33% |
| Thursday Night | 54°F | Slight Chance Rain Showers | 5 mph SE | 18% |
| Friday | 69°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph SE | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South Sioux City, NE
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5a
Explore more for South Sioux City, NE: full frost dates · planting calendar · Nebraska frost dates
Climate data from the nearest NOAA station, Sioux City Ang, Ia (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.