September weather forecast
New Berlin, WI

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Weather in September

September in New Berlin, Wisconsin, marks the onset of the autumn season, showcasing a gradual decline in temperatures. This month is a transition from the heat of August towards a cooler October, exhibiting a mix of summer's tail-end warmth and autumn's crisp evenings. The fall foliage starts to appear, adorning the city with its vivid charm. The soothing weather paired with the visual spectacle offers residents a truly delightful September experience.

Temperature

The arrival of September in New Berlin corresponds with a minor reduction in the average high-temperature, down from August's warm 77.2°F (25.1°C) to an agreeable 70.7°F (21.5°C). Throughout the month of September, New Berlin witnesses an average low-temperature of 56.1°F (13.4°C).

Humidity

In New Berlin, the average relative humidity in September is 77%.

Rainfall

In New Berlin, during September, the rain falls for 12.3 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, there are 128.2 rainfall days, and 18.78" (477mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall.

Daylight

In New Berlin, the average length of the day in September is 12h and 29min.
On the first day of September in New Berlin, sunrise is at 6:17 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:34 pm CDT.

Sunshine

The average sunshine in September in New Berlin is 9.1h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 4 during September translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
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Frequently asked questions

What is the average September temperature in New Berlin?

An average high-temperature, in September, in New Berlin, is 70.7°F (21.5°C) and the average low-temperature is 56.1°F (13.4°C).

What is the average humidity in September in New Berlin?

In September, the average relative humidity in New Berlin, Wisconsin, is 77%.

How much does it rain in New Berlin in September?

In New Berlin, during September, the rain falls for 12.3 days and regularly aggregates up to 1.46" (37mm) of precipitation.

When it does not snow in New Berlin?

In New Berlin, Wisconsin, snow does not fall in June through September.

Does it snow in New Berlin in September?

In New Berlin, Wisconsin, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in New Berlin?

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

When is the sunrise / sunset in September in New Berlin?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:34 pm CDT.

How long on average sun shines in September in New Berlin?

In New Berlin, the average sunshine duration in September is 9.1h.

What is the UV index reading in September in New Berlin?

The average daily maximum UV index in September in New Berlin, Wisconsin, is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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
New Berlin, WI

Average temperature in September - New Berlin, WI
  • Average high temperature in September: 70.7°F

The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (25.7°F).

  • Average low temperature in September: 56.1°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

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Average pressure in September
New Berlin, WI

Average pressure in September - New Berlin, 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
New Berlin, WI

Average wind speed in September - New Berlin, WI
  • Average wind speed in September: 8.1mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is July (6.9mph).

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Average humidity in September
New Berlin, WI

Average humidity in September - New Berlin, WI
  • Average humidity in September: 77%

The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (76%).

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Average rainfall in September
New Berlin, WI

Average rainfall in September - New Berlin, WI
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is July (2.48").
The driest month (with the least rainfall) is December (0.75").

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Average rainfall days in September
New Berlin, WI

Average rainfall days in September - New Berlin, WI
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in September
New Berlin, WI

Average snowfall in September - New Berlin, WI
  • Average snowfall in September: 0"

The month with the highest snowfall is January (2.76").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
New Berlin, WI

Average snowfall days in September - New Berlin, WI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.6 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
New Berlin, WI

Average daylight in September / Average sunshine in September - New Berlin, 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 months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in September
New Berlin, WI

Average sunshine days in September - New Berlin, WI
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is July (11.5 days).

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Average UV index in September
New Berlin, WI

Average UV index in September - New Berlin, 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
New Berlin, WI

Average cloud cover in September - New Berlin, WI
  • Average cloud cover in September: 30

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 29).

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Average visibility in September
New Berlin, WI

Average visibility in September - New Berlin, 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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New Berlin, Wisconsin, USA

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