Sioux City Weather in September

What's the weather like in Sioux City (Iowa) in September 2024?

The climate in Sioux City during September can be summarized as mild and reasonably dry.

September is in the fall / autumn in Sioux City and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 24°C (75°F), whilst at night 11°C (51°F) is normal.

Sioux City weather averages (imperial / metric)
Daytime temperature 24°C 75.2°F
Nightly temperature 10.8°C 51.4°F
Average temperature 17.4°C 63.3°F
Daily sunshine 8.5 hrs
Avg rainfall 73 mm 2.9 ins
Rainy days 9 days
Sea temperature 17.8°C 64.1°F
Humidity 71%
Windspeed 16.6kph 10 mph

On average September is the 5th wettest month of the year in Sioux City with around 73mm 2.9 inches of rain making it a reasonably dry 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 8.5 hours of sunshine per day.

September temperatures in Sioux City

Sioux City average temperature in September

September rainfall

Sioux City average rain in September

September hourly sunshine

Sioux City average rain in September

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 September 2024.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Sioux City weather stats

Sioux City weather statistics
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
Map showing location of Sioux City (42.49999, -96.40031) Sioux City map pin © Google

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