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

In Madison, the beginning of December is marked by a lowered average high-temperature, shifting from November's icy 42.4°F (5.8°C) to a freezing cold 30.4°F (-0.9°C). During December, Madison sees a mean low-temperature of 20.3°F (-6.5°C).

Humidity

In Madison, the average relative humidity in December is 84%.

Rainfall

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.

Snowfall

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

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

Sunshine

The average sunshine in December 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 value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: A maximum high daily UV index of 1 during December translates into the following directions:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take note! UV radiation from the Sun can double in intensity due to snow reflection.

Frequently asked questions

How cold is December?

In Madison, 30.4°F (-0.9°C) is the average high-temperature and 20.3°F (-6.5°C) is the average low-temperature during December.

What is the average humidity in December?

In Madison, the average relative humidity in December is 84%.

What is the driest month?

The months with the least rainfall in Madison are January, March, November and December Rain falls for 2 days and accumulates 0.24" (6mm) of rain.

How many days does it rain in December?

In Madison, in December, it is raining for 2 days, with typically 0.24" (6mm) of accumulated precipitation.

How many days does it snow in December?

In Madison, in December, snow falls for 4.9 days, with typically accumulated 0.16" (4mm) of snow.

What is the month with the shortest days?

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

What is the average length of the day in December?

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

When is the sunrise / sunset in December?

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 many hours of sunshine does Madison have in December?

In December, the average sunshine duration is 3.9h.

What are the months with the lowest UV index?

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

What is the UV index reading in December?

The average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability 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
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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Madison, Wisconsin, USA

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