Sioux City Weather: September
 |
Average Day Temperature: | 83.1°F |
|
Average Night Temperature: | 60.9°F |
|
Number of Sunny Days: | 19 days |
| Sunshine Hours: | 11.8 - 13.1 hours | |
|
Number of Rainy Days: | 1 day |
| Precipitation Totals: | 0.4 in | |
| detailed information | ||
14 day weather
forecast
forecast
| Sioux City |
When is the Best
Time to Visit?
Time to Visit?
| Sioux City |
Air Temperature in September, °F
The highest day temperature in September 2025 was 99°F. The lowest night temperature was 36°F. The average values for day and night temperatures during September were 80.8°F и 58.5°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 0.4 in.
Wind Speed in September, mph
The average wind speed in September is 10.1 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 9.3 hours.
Sioux City on the Weather Map
USA Resorts:
NAME
F°
| Boston |  |
+80 |
| Chicago |  |
+82 |
| Hawaii |  |
+84 |
| Houston | |
+108 |
| Las Vegas |  |
+116 |
| Los Angeles | |
+96 |
| Maui | |
+70 |
| Miami | |
+92 |
| Myrtle Beach | |
+84 |
| New York | |
+82 |
| San Diego | |
+96 |
| San Francisco | |
+64 |
| Santa Monica | |
+86 |
| Sarasota | |
+92 |
| Washington | |
+84 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Sioux City
Local time: 16:28
25 aug, tuesday
| 1800 |  |
94°F | E 4 mph |
| 2100 |  |
80°F | NE 16 mph |
26 aug, wednesday
| 0000 | |
70°F | E 6 mph |
| 0300 | |
70°F | SE 7 mph |
| 0600 | |
66°F | SE 7 mph |
| 0900 |  |
70°F | SE 9 mph |
| 1200 | |
86°F | SE 14 mph |
| 1500 | |
92°F | SE 16 mph |