Live Weather & Forecast

Weather in South Sioux City

Nebraska, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
26°C
Feels like 25°C
78°F / Feels 77°F
Sunny
South Sioux City, Nebraska
🌞 Daytime
Updated: 2026-04-12 13:15
💧
Humidity
48%
💨
Wind
30.2 km/h SSW
🌬️
Wind Gust
34.8 km/h
🌡️
Pressure
1003 mb
👁️
Visibility
16 km
☀️
UV Index
6.5 (High)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
0%
💦
Dew Point
9.9°C
🌐
Wind Degree
209°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
158.9 μg/m³
NO₂
3.6 μg/m³
O₃
112 μg/m³
SO₂
1.4 μg/m³
PM 2.5
6.1 μg/m³
PM 10
18.7 μg/m³

Weather Alerts 2

Met · Severe · Expected
Red Flag Warning issued April 12 at 2:51AM CDT until April 12 at 7:00PM CDT by NWS Sioux Falls SD

The National Weather Service in Sioux Falls has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 7 PM CDT this evening. * AFFECTED AREA...In Nebraska, Dixon. In South Dakota, McCook, Minnehaha, Turner, Lincoln, Clay and Union. * WINDS...West 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...Any fire...

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T02:51:00-05:00  ·  Expires: 2026-04-12T12:30:00-05:00
Met · Severe · Expected
Red Flag Warning issued April 12 at 2:52AM CDT until April 12 at 7:00PM CDT by NWS Omaha/Valley NE

The National Weather Service in Omaha/Valley has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 7 PM CDT this evening. * AFFECTED AREA...Knox, Cedar, Antelope, Pierce, and Wayne Counties. * TIMING...From noon today to 7 PM CDT this evening. * WINDS...West 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IM...

A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity and warm temperatures can contribute to extreme fire behavior.

Effective: 2026-04-12T02:52:00-05:00  ·  Expires: 2026-04-12T19:00:00-05:00

Today's Hourly Forecast

24-hour breakdown for South Sioux City, Nebraska

12 AM
Clear
16°
Clear
💧 89% 💨 30.2 km/h
1 AM
Clear
16°
Clear
💧 89% 💨 30.6 km/h
2 AM
Clear
16°
Clear
💧 88% 💨 32.4 km/h
3 AM
Clear
16°
Clear
💧 88% 💨 31.7 km/h
4 AM
Clear
16°
Clear
💧 88% 💨 32.4 km/h
5 AM
Clear
16°
Clear
💧 88% 💨 29.2 km/h
6 AM
Clear
16°
Clear
💧 87% 💨 28.8 km/h
7 AM
Sunny
17°
Sunny
💧 86% 💨 29.2 km/h
8 AM
Sunny
17°
Sunny
💧 84% 💨 28.8 km/h
9 AM
Sunny
19°
Sunny
💧 82% 💨 29.5 km/h
10 AM
Sunny
21°
Sunny
💧 74% 💨 31.7 km/h
11 AM
Sunny
25°
Sunny
💧 64% 💨 32.4 km/h
12 PM
Sunny
28°
Sunny
💧 46% 💨 30.6 km/h
1 PM
Sunny
26°
Sunny
💧 48% 💨 30.2 km/h
2 PM
Sunny
32°
Sunny
💧 21% 💨 27.7 km/h
3 PM
Sunny
32°
Sunny
💧 16% 💨 25.2 km/h
4 PM
Sunny
31°
Sunny
💧 11% 💨 23.4 km/h
5 PM
Cloudy
30°
Cloudy
💧 22% 💨 20.9 km/h
6 PM
Overcast
28°
Overcast
💧 25% 💨 20.2 km/h
7 PM
Cloudy
25°
Cloudy
💧 44% 💨 20.9 km/h
8 PM
Partly Cloudy
23°
Partly Cloudy
💧 59% 💨 23 km/h
9 PM
Thundery outbreaks in nearby
21°
Thundery outbreaks in nearby
💧 77% 💨 22.3 km/h
10 PM
Clear
20°
Clear
💧 87% 💨 21.2 km/h
11 PM
Clear
19°
Clear
💧 87% 💨 19.1 km/h

3-Day Forecast

Daily overview for South Sioux City, Nebraska

Today
Sunny
Sunny
33° / 16°
🌧️ 0% chance of rain
💧 Avg. humidity: 64%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:49 AM
🌇 Sunset: 08:04 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Overcast
Overcast
25° / 16°
🌧️ 0% chance of rain
💧 Avg. humidity: 81%
💨 Max wind: 28.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:47 AM
🌇 Sunset: 08:05 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Moderate rain
Moderate rain
19° / 12°
🌧️ 85% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 20.2 km/h
🌧️ Total precip: 18.62 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:46 AM
🌇 Sunset: 08:06 PM
🌙 Waning Crescent
🌑 Moon: 15% lit

Best Time to Visit South Sioux City

Plan your trip to South Sioux City, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to South Sioux City 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in South Sioux City?
Current conditions in South Sioux City: Sunny, temperature 26°C, humidity 48%.
What is the best time to visit South Sioux City?
The best time to visit South Sioux City is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in South Sioux City?
South Sioux City is located at approximately 42.5° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in South Sioux City?
The wettest period in South Sioux City is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to South Sioux City?
For visits to South Sioux City during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is South Sioux City in?
South Sioux City is located in United States, in the state of Nebraska.
What are the public holidays in South Sioux City in 2026?
View the 2026 public holidays for South Sioux City on our Holidays page.
What are the GPS coordinates used for the weather forecast in South Sioux City?
The weather forecast for South Sioux City uses coordinates 42.4743, -96.4136.