Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a pleasant 72.5°F (22.5°C) in August to an enjoyable 65.3°F (18.5°C). September nights in Sioux are marked by an average low-temperature of 52.5°F (11.4°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In Sioux, during September, the rain falls for 12.5 days and regularly aggregates up to 1.77" (45mm) of precipitation. In Sioux, during the entire year, the rain falls for 127.9 days and collects up to 22.56" (573mm) of precipitation.Snowfall
In Sioux, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:24 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:01 am and sunset at 6:44 pm CDT.
Sunshine
In September, the average sunshine in Sioux is 8.9h.UV index
In September, the average daily maximum UV index in Sioux is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What is the temperature in September in Sioux?
What is the average humidity in September in Sioux?
How many days does it rain in September in Sioux?
When it does not snow in Sioux?
Does it snow in Sioux in September?
How many hours of daylight does Sioux have in September?
When are sunrise and sunset in September in Sioux?
How long on average sun shines in September in Sioux?
How high is the UV index in September in Sioux?
Average temperature in September
Sioux, WI
- Average high temperature in September: 65.3°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (20.3°F).
- Average low temperature in September: 52.5°F
The month with the highest average low temperature is August (57.9°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).
Average pressure in September
Sioux, WI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Sioux, WI
- Average wind speed in September: 8.7mph
The windiest months (with the highest average wind speed) are January and December (10.6mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).
Average humidity in September
Sioux, WI
- Average humidity in September: 78%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is May (75%).
Average rainfall in September
Sioux, WI
- Average rainfall in September: 1.77"
The wettest months (with the highest rainfall) are May and July (2.56").
The driest months (with the least rainfall) are January and February (1.06").
Average rainfall days in September
Sioux, WI
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in September
Sioux, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.85").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Sioux, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (22.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sioux, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Sioux, WI
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is December (8.7 days).
Average UV index in September
Sioux, WI
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Sioux, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Sioux, WI
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Sioux, Wisconsin, USA
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