December weather forecast
Madison, WI

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The State Capitol building in Madison, Wisconsin, on a beautiful spring evening
The State Capitol building in Madison, Wisconsin, on a beautiful spring evening

Weather in December

December marks the advent of winter in Madison with average temperatures declining to a chilly high of 30.4°F (-0.9°C). The city dons a festive look, bathed in snow and adorned with holiday decorations. The daylight hours shrink further, adding a cozy winter charm to the city. Despite the chill, the warmth of holiday season celebrations keeps the spirits of Madisonians high. The snowy landscape offers great opportunities for winter sports, rounding off the year on an active note.

Temperature

The shift from November to December in Madison involves a decrease in the average high-temperature, from a wintry 42.4°F (5.8°C) to a subzero cold 30.4°F (-0.9°C). In Madison, the nighttime temperature averages to a still freezing cold 20.3°F (-6.5°C) during December.

Humidity

The average relative humidity in December is 84%.

Rainfall

January, March, November and December are months with the least rain in Madison when the rain falls for 2 days and typically aggregates up to 0.24" (6mm) of rain.

Snowfall

January through April, October through December are months with snowfall. In Madison, during December, snow falls for 4.9 days and regularly aggregates up to 0.16" (4mm) of snow. In Madison, during the entire year, snow falls for 22.6 days and aggregates up to 2.83" (72mm) of snow.

Daylight

With an average of 9h and 6min of daylight, December has the shortest days of the year in Madison, Wisconsin.
On the first day of the month, sunrise is at 7:10 am and sunset at 4:23 pm. On the last day of December, in Madison, sunrise is at 7:29 am and sunset at 4:32 pm CST.

Sunshine

The average sunshine in December in Madison is 3.9h.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 1 during December leads to these instructions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

How cold is it in Madison in December?

The high-temperature, in December, in Madison, is 30.4°F (-0.9°C), while the low-temperature averages to 20.3°F (-6.5°C).

What is the average humidity in December in Madison?

The average relative humidity in December in Madison, Wisconsin, is 84%.

What is the driest month in Madison?

January, March, November and December are months with the least rain when the rain falls for 2 days and typically aggregates up to 0.24" (6mm) of rain.

How much does it rain in Madison in December?

In Madison, during December, the rain falls for 2 days and regularly aggregates up to 0.24" (6mm) of precipitation.

How much does it snow in Madison in December?

In Madison, Wisconsin, in December, during 4.9 snowfall days, 0.16" (4mm) of snow is typically accumulated.

What is the month with the shortest days in Madison?

December has the shortest days of the year, with an average of 9h and 6min of daylight.

How many hours of daylight does Madison have in December?

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

What time are sunrise and sunset in December in Madison?

On the first day of December, sunrise is at 7:10 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 4:32 pm CST.

How long on average sun shines in December in Madison?

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

What are the months with the lowest UV index in Madison?

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

How high is the UV index in December in Madison?

The average daily maximum UV index in December in Madison, Wisconsin, is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to Sun's UV rays.
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
Madison, WI

Average temperature in December - Madison, WI
  • Average high temperature in December: 30.4°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (23.9°F).

  • Average low temperature in December: 20.3°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average pressure in December
Madison, WI

Average pressure in December - Madison, WI
  • Average pressure in December: 30.09"Hg

The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

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Average wind speed in December
Madison, WI

Average wind speed in December - Madison, WI
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in December
Madison, WI

Average humidity in December - Madison, WI
  • Average humidity in December: 84%

The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and October (77%).

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Average rainfall in December
Madison, WI

Average rainfall in December - Madison, WI
  • Average rainfall in December: 0.24"

The wettest month (with the highest rainfall) is July (0.63").
The driest months (with the least rainfall) are January, March, November and December (0.24").

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Average rainfall days in December
Madison, WI

Average rainfall days in December - Madison, WI
  • Average rainfall days in December: 2 days

The month with the highest number of rainy days is June (6.7 days).
The month with the least rainy days is January (1.1 days).

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Average snowfall in December
Madison, WI

Average snowfall in December - Madison, WI
  • Average snowfall in December: 0.16"

The month with the highest snowfall is February (0.94").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in December
Madison, WI

Average snowfall days in December - Madison, WI
  • Average snowfall days in December: 4.9 days

The month with the highest number of snowfall days is January (5.6 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
Madison, WI

Average daylight in December / Average sunshine in December - Madison, 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 month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

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Average sunshine days in December
Madison, WI

Average sunshine days in December - Madison, WI
  • Average sunshine days in December: 27 days

The month with the most sunshine days is December (27 days).
The month with the least sunshine days is June (19.8 days).

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Average UV index in December
Madison, WI

Average UV index in December - Madison, WI
  • Average UV index in December: 1

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

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Average cloud cover in December
Madison, WI

Average cloud cover in December - Madison, WI
  • Average cloud cover in December: 62

The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in December
Madison, WI

Average visibility in December - Madison, WI
  • Average visibility in December: 6mi

The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).

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Madison, Wisconsin, USA

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