Measurements:
°C
°F
Sioux City
52°F
SE 4 mph
Feels like: 50°F
Precip: 65%
World Resorts USA Sioux City Weather September Weather in Sioux City

Sioux City Weather: September

Average Day Temperature: 82.2°F
Average Night Temperature: 61.4°F
Number of Sunny Days: 17 days
Sunshine Hours: 11.8 - 13.1 hours
Number of Rainy Days: 1 day
Precipitation Totals: 0.6 in

Air Temperature in September, °F

Select Year: 2026 2025 2024

The highest day temperature in September 2026 was 103°F. The lowest night temperature was 52°F. The average values for day and night temperatures during September were 76.8°F и 64.7°F respectivly.

Sunny, Cloudy and Gloomy days

Most of the days in September are sunny but you can also expect cloudy and gloomy days.

Precipitation Totals in September, in

Precipitation total in September for Sioux City is 0.6 in.

Wind Speed in September, mph

The average wind speed in September is 10.0 mph.

Average Sunny Hours Per Day

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Sioux City in September is 8.5 hours.

Best Time to Visit Sioux City
The most sunny months:
October 18 days
July 17 days
September 17 days
The most warm months:
July 88.2 °F
August 88.0 °F
June 84.0 °F
The most cold months:
January 22.5 °F
February 29.3 °F
December 30.9 °F
The most rainy months:
April 2 days
June 2 days
May 2 days
The most windy months:
April 12 mph
March 11 mph
October 10 mph

Sioux City on the Weather Map

USA Resorts:
NAME
F°
Boston +58
Chicago +58
Hawaii +80
Houston +76
Las Vegas +64
Los Angeles +74
Maui +72
Miami +82
New York +62
Panama City Beach +66
San Diego +74
San Francisco +60
Santa Monica +72
Tampa +74
Washington +56
24 Hours Weather Forecast
Sioux City
Local time: 21:44
27 oct, tuesday
0000 50°F
SE
9 mph
0300 48°F
SE
7 mph
0600 46°F
SE
7 mph
0900 46°F
SE
5 mph
1200 54°F
NE
5 mph
1500 62°F
N
8 mph
1800 62°F
N
9 mph
2100 60°F
N
7 mph