Sioux City Weather in July
What's the weather like in Sioux City (Iowa) in July 2025?
The climate in Sioux City during July can be summarized as hot and a little damp.
July is in the summer in Sioux City and is typically the warmest month of the year. Daytime maximum temperatures average around 31°C (87°F), whilst at night 18°C (64°F) is normal.
| Daytime temperature | 30.5°C 86.9°F |
|---|---|
| Nightly temperature | 17.9°C 64.2°F |
| Average temperature | 24.2°C 75.6°F |
| Daily sunshine | 11.5 hrs |
| Avg rainfall | 83 mm 3.3 ins |
| Rainy days | 9 days |
| Sea temperature | 16.3°C 61.4°F |
| Humidity | 68% |
| Windspeed | 15.8kph 10 mph |
On average July is the 3rd wettest month of the year in Sioux City with around 83mm 3.3 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 11.5 hours of sunshine per day.
July temperatures in Sioux City
July rainfall
July hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sioux City in July 2025.
Other monthly averages
Sioux City weather stats
| Hottest month: | July | 30.2°C 86.4°F |
|---|---|---|
| Driest month: | January | 14mm 0.6ins |
| Sunniest month: | July | 11.5hrs |
| Coldest month: | January | -2.7°C 27.1°F |
| Wettest month: | June | 95mm 3.7ins |
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