December weather forecast
New Berlin, WI

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Weather in December

December in New Berlin, Wisconsin, welcomes the winter season with a delightfully festive atmosphere and a drop in temperature. The white snow offers a stark contrast to the preceding months, creating a typical winter landscape. The snowfall levels increase to 1.54" (39mm) from its predecessor November, making it the second-highest of the year. While it is significantly colder than November, December announces the holiday season, allowing residents to enjoy the winter charm just in time for Christmas and New Year. The winter wonderland effect brings an enchanting close to the year, making for picturesque views and a cozy environment.

Temperature

December is characterized by a reduction in the average high-temperature, from a chilly 43.7°F (6.5°C) in November to an icy 32°F (0°C). New Berlin notes an average temperature descent to a subzero cold 23.2°F (-4.9°C) in December, a small shift from its daytime peak.

Humidity

In New Berlin, the average relative humidity in December is 82%.

Rainfall

December is the month with the least rainfall in New Berlin. Rain falls for 5.6 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in New Berlin. In December, it is snowing for 9.6 days. Throughout December, 1.54" (39mm) of snow is accumulated. Throughout the year, there are 46 snowfall days, and 9.72" (247mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 7:04 am and sunset at 4:18 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:27 pm CST.

Sunshine

The average sunshine in December is 3.9h.

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 1 suggests these recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

How cold is it in New Berlin in December?

The high-temperature, in December, in New Berlin, is 32°F (0°C), while the low-temperature averages to 23.2°F (-4.9°C).

What is the average humidity in December in New Berlin?

The average relative humidity in December is 82%.

What is the driest month in New Berlin?

The month with the least rainfall in New Berlin, Wisconsin, is December, when the rain falls for 5.6 days and typically collects 0.75" (19mm) of precipitation.

How many days does it rain in December in New Berlin?

In New Berlin, Wisconsin, in December, it is raining for 5.6 days, with typically 0.75" (19mm) of accumulated precipitation.

How many days does it snow in December in New Berlin?

In New Berlin, in December, during 9.6 snowfall days, 1.54" (39mm) of snow is typically accumulated.

What is the month with the shortest days in New Berlin?

The month with the shortest days in New Berlin, Wisconsin, is December, with an average of 9h and 6min of daylight.

How many hours of daylight does New Berlin have in December?

In December, the average day length in New Berlin, Wisconsin, is 9h and 4min.

What time are sunrise and sunset in December in New Berlin?

On the first day of December in New Berlin, Wisconsin, sunrise is at 7:04 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:27 pm CST.

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

The average sunshine duration in December in New Berlin, Wisconsin, is 3.9h.

When is the lowest UV index in New Berlin?

The months with the lowest UV index in New Berlin, Wisconsin, are January and December, with an average maximum UV index of 1.

How high is the UV index in December in New Berlin?

The average daily maximum UV index in December in New Berlin, Wisconsin, is 1. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
New Berlin, WI

Average temperature in December - New Berlin, WI
  • Average high temperature in December: 32°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 December: 23.2°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 December
New Berlin, WI

Average pressure in December - New Berlin, WI
  • Average pressure in December: 30.08"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 December
New Berlin, WI

Average wind speed in December - New Berlin, WI
  • Average wind speed in December: 10.3mph

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 December
New Berlin, WI

Average humidity in December - New Berlin, WI
  • Average humidity in December: 82%

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 December
New Berlin, WI

Average rainfall in December - New Berlin, WI
  • Average rainfall in December: 0.75"

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 December
New Berlin, WI

Average rainfall days in December - New Berlin, WI
  • Average rainfall days in December: 5.6 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 December
New Berlin, WI

Average snowfall in December - New Berlin, WI
  • Average snowfall in December: 1.54"

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 December
New Berlin, WI

Average snowfall days in December - New Berlin, WI
  • Average snowfall days in December: 9.6 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 December /
Average sunshine in December
New Berlin, WI

Average daylight in December / Average sunshine in December - New Berlin, WI
  • Average daylight in December: 9h and 1min

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 December: 3h and 5min

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 December
New Berlin, WI

Average sunshine days in December - New Berlin, WI
  • Average sunshine days in December: 17.5 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 December
New Berlin, WI

Average UV index in December - New Berlin, WI
  • Average UV index in December: 1

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 December
New Berlin, WI

Average cloud cover in December - New Berlin, WI
  • Average cloud cover in December: 61

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 December
New Berlin, WI

Average visibility in December - New Berlin, WI
  • Average visibility in December: 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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