Sioux Falls in september: average Weather, Temperature and Climate
Weather in Sioux Falls in september 2025
The weather in Sioux Falls in september comes from statistical datas on the past years. You can view the weather statistics the entire month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
56°F
Clear/Sunny
41% of time
22%
14%
12%
Weather at 12pm
74°F
Clear/Sunny
54% of time
19%
13%
9%
Weather at 6pm
70°F
Clear/Sunny
58% of time
22%
9%
6%
Weather at 3am
58°F
45%
22%
14%
9%
Evolution of daily average temperature and precipitation in Sioux Falls in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Sioux Falls in september.
The climate of Sioux Falls in september is good
The climate in september in Sioux Falls is relatively dry (with 3.7in of rainfall over 5 days). It should be noted an improvement from the previous month since in august it receives an average of 4.8in of precipitation over 7 days.
The climate comfortable in that locality september. Temperatures are up to 76°F. The seasonal minimum is 56°F. Thus, the mean temperature average on this month of september in Sioux Falls is 67°F. Note that seasonal normals in contrast with those observed in Sioux Falls in september with a maximum record of 99°F in 2021 and a minimum record of 31°F in 2012. You can plan to have about 4 days with temperatures above 86°F, or 13 of the month.
On this month of september, day length in Sioux Falls is generally 12:29. The sun rises at 06:07 and sunset is at 18:36.
With a good weather, this month is advisable to go in Sioux Falls in United States.
Seasonal average climate and temperature of Sioux Falls in september
Check below seasonal norms These statistics are set from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 67°F | ||||
| Highest temperature | 76°F | ||||
| Lowest temperature | 56°F | ||||
| Highest record temperature | 99°F (2021) | ||||
| Lowest record temperature | 31°F (2012) | ||||
| Number of days at +86°F | 4 day(s) (13%) | ||||
| Number of days at +65°F | 27 day(s) (90%) | ||||
| Number of days at -32°F | 0 day(s) (0%) | ||||
| Wind | |||||
| Wind speed | 21km/h | ||||
| Wind temperature | 54°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.7in | ||||
| Number of days with rainfall | 5 day(s) (16%) | ||||
| Record daily rainfall | 2in (2019) | ||||
| Snowfall | 0cm | ||||
| Other climate data | |||||
| Humidity | 83% | ||||
| Visibility | 9.31km | ||||
| Cloud cover | 28% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:07 | ||||
| Time of sunset | 18:36 | ||||
| Length of day | 12:29 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Sioux Falls in september 2024:
58°F to 77°F
50°F to 85°F
58°F to 88°F
63°F to 97°F
67°F to 83°F
54°F to 77°F
47°F to 77°F
54°F to 88°F
63°F to 97°F
68°F to 95°F
65°F to 97°F
63°F to 94°F
67°F to 92°F
61°F to 88°F
65°F to 90°F
65°F to 90°F
67°F to 85°F
67°F to 85°F
68°F to 85°F
54°F to 85°F
58°F to 77°F
43°F to 67°F
41°F to 74°F
52°F to 77°F
54°F to 85°F
52°F to 85°F
52°F to 86°F
52°F to 88°F
56°F to 86°F
58°F to 83°F
Map: other cities in the United States (USA) in september
Cities near Sioux Falls:
| Minneapolis (Minnesota) in september | perfect weather |
| Des Moines in september | good weather |
| Kansas City in september | good weather |
| Kansas in september | good weather |
| Mount Rushmore in september | good weather |
| North Dakota in september | good weather |
| Wisconsin in september | good weather |
| Illinois in september | good weather |
| Missouri in september | good weather |
| Chicago in september | good weather |
| St. Louis (Missouri) in september | good weather |
| Denver in september | perfect weather |
Click over cities on the map for information about the weather in september.
Sioux Falls
perfect weather
good
tolerable
bad
very bad
Weather data for Sioux Falls in september:
Weather data for Sioux Falls for september are derived from an average of the weather forecast since 2009 in Sioux Falls. There is a margin of error and these forecasts are to be considered as general information only. The weather in Sioux Falls can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Sioux Falls.