December weather forecast
Mequon, WI

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Weather in December

Winter's arrival in December transforms Mequon, Wisconsin into a snowy wonderland with temperatures between 32.2°F (0.1°C) and 23.7°F (-4.6°C). The short days and blue twilight cast a cold beauty over the frosty landscape. A veil of white descends upon the town, softening the angles and muting the colors except for bright red cardinals and twinkling holiday lights. Warm glows emanate from windows while fireplaces burn, keeping homes cozy during the chilling nights. The first carols heard in the air signal the start of the holiday season, bringing an end to the year with a festive note.

Temperature

The start of December in Mequon comes with a reduction in the average high-temperature, receding from a chilly 43.7°F (6.5°C) in November to a wintry 32.2°F (0.1°C). Nights in December showcase an average temperature of 23.7°F (-4.6°C), slightly cooler than the daytime.

Humidity

In December, the average relative humidity in Mequon, Wisconsin, is 82%.

Rainfall

The months with the least rainfall are February and December Rain falls for 6.4 days and accumulates 0.94" (24mm) of rain.

Snowfall

January through April, October through December are months with snowfall in Mequon. In Mequon, in December, during 10.1 snowfall days, 2.01" (51mm) of snow is typically accumulated. In Mequon, during the entire year, snow falls for 47.8 days and aggregates up to 11.57" (294mm) of snow.

Daylight

The month with the shortest days in Mequon is December, with an average of 9h and 0min of daylight.
On the first day of the month, sunrise is at 7:05 am and sunset at 4:17 pm. On the last day of December, in Mequon, sunrise is at 7:24 am and sunset at 4:26 pm CST.

Sunshine

In Mequon, Wisconsin, the average sunshine in December is 3.9h.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Mequon. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 1 during December leads to these advisories:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Mequon?

An average high-temperature, in December, in Mequon, is 32.2°F (0.1°C) and the average low-temperature is 23.7°F (-4.6°C).

What is the average humidity in December in Mequon?

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

What is the driest month in Mequon?

The months with the least rainfall are February and December Rain falls for 6.4 days and accumulates 0.94" (24mm) of rain.

How many days does it rain in December in Mequon?

In December, the rain falls for 6.4 days. Throughout December, 0.94" (24mm) of precipitation is accumulated.

How many days does it snow in December in Mequon?

In December, it is snowing for 10.1 days. Throughout December, 2.01" (51mm) of snow is accumulated.

What is the month with the shortest days in Mequon?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Mequon.

How many hours of daylight does Mequon have in December?

The average day length in December in Mequon is 9h and 3min.

When are sunrise and sunset in December in Mequon?

In December, on the first day of the month, sunrise is at 7:05 am and sunset at 4:17 pm. On the last day of the month, in Mequon, Wisconsin, sunrise is at 7:24 am and sunset at 4:26 pm CST.

How many hours of sunshine does Mequon have in December?

In Mequon, the average sunshine duration in December is 3.9h.

When is the lowest UV index in Mequon?

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

What is the UV index reading in December in Mequon?

The average daily maximum UV index in December in Mequon, Wisconsin, is 1. A UV Index reading of 2, and below, represents a minimal hazard to health 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
Mequon, WI

Average temperature in December - Mequon, WI
  • Average high temperature in December: 32.2°F

The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (25.9°F).

  • Average low temperature in December: 23.7°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).

Average pressure in December
Mequon, WI

Average pressure in December - Mequon, 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).

Average wind speed in December
Mequon, WI

Average wind speed in December - Mequon, WI
  • Average wind speed in December: 11mph

The windiest month (with the highest average wind speed) is January (11.7mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).

Average humidity in December
Mequon, WI

Average humidity in December - Mequon, WI
  • Average humidity in December: 82%

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

Average rainfall in December
Mequon, WI

Average rainfall in December - Mequon, WI
  • Average rainfall in December: 0.94"

The wettest month (with the highest rainfall) is July (2.8").
The driest months (with the least rainfall) are February and December (0.94").

Average rainfall days in December
Mequon, WI

Average rainfall days in December - Mequon, WI
  • Average rainfall days in December: 6.4 days

The month with the highest number of rainy days is July (15.7 days).
The month with the least rainy days is February (4.3 days).

Average snowfall in December
Mequon, WI

Average snowfall in December - Mequon, WI
  • Average snowfall in December: 2.01"

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

Average snowfall days in December
Mequon, WI

Average snowfall days in December - Mequon, WI
  • Average snowfall days in December: 10.1 days

The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Mequon, WI

Average daylight in December / Average sunshine in December - Mequon, WI
  • Average daylight in December: 9h and 0min

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 0min).

  • Average sunshine in December: 3h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in December
Mequon, WI

Average sunshine days in December - Mequon, WI
  • Average sunshine days in December: 16.8 days

The month with the most sunshine days is December (16.8 days).
The month with the least sunshine days is July (11.9 days).

Average UV index in December
Mequon, WI

Average UV index in December - Mequon, 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).

Average cloud cover in December
Mequon, WI

Average cloud cover in December - Mequon, WI
  • Average cloud cover in December: 60

The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in December
Mequon, WI

Average visibility in December - Mequon, 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).

Mequon, Wisconsin, USA

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