North Sioux City (IA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit North Sioux City.
Climate overview of North Sioux City
North Sioux City, Iowa, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 30°C (86°F) in July, while winters cool to -1°C (30°F) in January.
North Sioux City sees a moderate amount of rain/snowfall, totalling around 751 mm (30 in) per year. It experiences a distinct dry season from November to March, with very warm summers and very cold winters, creating some seasonal variation.
North Sioux City Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in North Sioux City - and find the best time to visit.
Monthly Temperature in North Sioux City
Depending on the time of the year, temperatures range from very warm to very cold in North Sioux City. Average maximum daytime temperatures range from a very warm 30°C (86°F) in July, the warmest time of the year, to a very cold -1°C (30°F) during cooler months like January.
At night, you can expect temperatures ranging from 18°C (64°F) in July to around -12°C (10°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in North Sioux City
Generally, North Sioux City has a moderate amount of precipitation, averaging 751 mm (30 in) of rain/snowfall annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives high rainfall, averaging 113 mm (4.4 in) of precipitation, recorded across 14 rainy days. In contrast, the driest month January brings less snowfall, with 14 mm (0.6 in) over 6 snowy days. For more details, please visit our North Sioux City Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit North Sioux City
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: September
- Warmest weather: July and August
- Fewest rainy days: November
- Seasonal pattern: A distinct dry season from November to March, with very warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in North Sioux City
What is the best time to visit North Sioux City?
September typically offers the most optimal weather in North Sioux City. In contrast, January, February, March and December tend to have less optimal conditions. North Sioux City has a distinct dry season from November to March, with very warm summers and very cold winters.
What temperatures can I expect in North Sioux City?
Daytime highs range from -1°C (30°F) in January to 30°C (86°F) in July. Nighttime lows range from -12°C (10°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does North Sioux City get?
Annual rainfall is around 751 mm (30 in). June is the wettest month with 113 mm (4.4 in), while January is the driest with 14 mm (0.6 in).
North Sioux City 3-Day Forecast
North Sioux City on the map
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