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
A minor decrease in the average high-temperature is observed during September, shifting from a warm 75.7°F (24.3°C) in August to an agreeable 69.6°F (20.9°C). Throughout September, South Milwaukee encounters an average temperature drop to a refreshing 58.3°F (14.6°C).Humidity
In South Milwaukee, the average relative humidity in September is 77%.Rainfall
In South Milwaukee, in September, during 12.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. Throughout the year, there are 131.9 rainfall days, and 18.54" (471mm) of precipitation is accumulated.Snowfall
In South Milwaukee, snow does not fall in May through September.Daylight
In South Milwaukee, the average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:33 pm CDT.
Sunshine
In South Milwaukee, the average sunshine in September is 9.2h.UV index
In South Milwaukee, Wisconsin, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, a regular UV index of 4 translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September in South Milwaukee?
When are sunrise and sunset in September in South Milwaukee?
How many hours of sunshine does South Milwaukee have in September?
What is the UV index intensity in September?
Average temperature in September
South Milwaukee, WI
- Average high temperature in September: 69.6°F
The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in September
South Milwaukee, WI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in September
South Milwaukee, WI
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in September
South Milwaukee, WI
- Average humidity in September: 77%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in September
South Milwaukee, WI
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is July (2.4").
The driest month (with the least rainfall) is February (0.75").
Average rainfall days in September
South Milwaukee, WI
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
South Milwaukee, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
South Milwaukee, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
South Milwaukee, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in September
South Milwaukee, WI
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in September
South Milwaukee, 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 and December (UV index 1).
Average cloud cover in September
South Milwaukee, WI
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in September
South Milwaukee, WI
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
South Milwaukee, Wisconsin, USA
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