September weather forecast
South Milwaukee, WI

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Weather in September

September, the first month of the autumn in South Milwaukee, is also an agreeable month, with an average temperature fluctuating between 69.6°F (20.9°C) and 58.3°F (14.6°C).

Temperature

South Milwaukee in September experiences a gentle temperature dip, with average high-temperatures reducing from a moderately hot 75.7°F (24.3°C) in August to a pleasant 69.6°F (20.9°C). South Milwaukee, during the month of September, experiences an average low-temperature of 58.3°F (14.6°C).

Humidity

The average relative humidity in September in South Milwaukee is 77%.

Rainfall

In South Milwaukee, during September, the rain falls for 12.1 days and regularly aggregates up to 1.54" (39mm) of precipitation. Throughout the year, in South Milwaukee, Wisconsin, there are 131.9 rainfall days, and 18.54" (471mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall in South Milwaukee.

Daylight

In September, the average length of the day in South Milwaukee is 12h and 29min.
On the first day of September in South Milwaukee, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:33 pm CDT.

Sunshine

In September, the average sunshine in South Milwaukee 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 moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 4 suggests these recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the average September temperature in South Milwaukee?

In South Milwaukee, 69.6°F (20.9°C) is the average high-temperature and 58.3°F (14.6°C) is the average low-temperature during September.

What is the average humidity in September in South Milwaukee?

In South Milwaukee, Wisconsin, the average relative humidity in September is 77%.

How much does it rain in South Milwaukee in September?

In September, the rain falls for 12.1 days. Throughout September, 1.54" (39mm) of precipitation is accumulated.

When it does not snow in South Milwaukee?

In South Milwaukee, Wisconsin, snow does not fall in May through September.

Does it snow in South Milwaukee in September?

In South Milwaukee, Wisconsin, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does South Milwaukee have in September?

In South Milwaukee, Wisconsin, the average day length in September is 12h and 29min.

When is the sunrise / sunset in September in South Milwaukee?

On the first day of September, sunrise is at 6:16 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:33 pm CDT.

How long on average sun shines in September in South Milwaukee?

In South Milwaukee, Wisconsin, the average sunshine duration in September is 9.2h.

How high is the UV index in September in South Milwaukee?

In South Milwaukee, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
South Milwaukee, WI

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).

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Average pressure in September
South Milwaukee, WI

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).

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Average wind speed in September
South Milwaukee, WI

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).

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Average humidity in September
South Milwaukee, WI

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%).

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Average rainfall in September
South Milwaukee, WI

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").

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Average rainfall days in September
South Milwaukee, WI

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).

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Average snowfall in September
South Milwaukee, WI

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").

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Average snowfall days in September
South Milwaukee, WI

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).

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Average daylight in September /
Average sunshine in September
South Milwaukee, WI

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).

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Average sunshine days in September
South Milwaukee, WI

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).

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Average UV index in September
South Milwaukee, WI

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).

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Average cloud cover in September
South Milwaukee, WI

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).

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Average visibility in September
South Milwaukee, WI

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).

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South Milwaukee, Wisconsin, USA

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