Milwaukee
Wisconsin, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Milwaukee, WI

A view of the modern Milwaukee City in Wisconsin, from Lake Michigan and over the pier
A view of the modern Milwaukee City in Wisconsin, from Lake Michigan and over the pier
December, the first month of the winter, in Milwaukee, is also a wintry month, with temperature in the range of an average high of 32.7°F (0.4°C) and an average low of 20.1°F (-6.6°C).

Temperature

In December, the average high-temperature decreases, from a chilly 46°F (7.8°C) in November, to a cold 32.7°F (0.4°C). In Milwaukee, the average low-temperature is 20.1°F (-6.6°C).

Humidity

December is the most humid month, with an average relative humidity of 75.9%.

Rainfall

In Milwaukee, during 10.9 rainfall days, 2" (51.8mm) of precipitation is typically accumulated. In Milwaukee, during the entire year, the rain falls for 126.7 days and collects up to 34.8" (882.9mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December.

Ocean temperature

In December, the average ocean temperature is 40.1°F (4.5°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

The month with the shortest days is December, with an average of 9.1h of daylight.

Sunshine

The month with the least sunshine in Milwaukee is December, with an average of 3.4h of sunshine.

UV index

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Milwaukee. A UV Index of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV rays for the average person.
In December, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Milwaukee?

In Milwaukee, Wisconsin, in December, the average high-temperature is 32.7°F (0.4°C), and the average low-temperature is 20.1°F (-6.6°C).

What is the most humid month in Milwaukee?

With an average relative humidity of 75.9%, December is the most humid month.

What is the average humidity in December in Milwaukee?

In Milwaukee, Wisconsin, the average relative humidity in December is 75.9%.

How much does it rain in Milwaukee in December?

In December, in Milwaukee, Wisconsin, the rain falls for 10.9 days. Throughout December, 2" (51.8mm) of precipitation is accumulated.

How many days does it snow in December in Milwaukee?

In Milwaukee, Wisconsin, during December, snow falls for 7.8 days and regularly aggregates up to 10.6" (269.2mm) of snow.

How cold is the water in December in Milwaukee?

In December, the average ocean temperature in Milwaukee is 40.1°F (4.5°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the month with the shortest days in Milwaukee?

The month with the shortest days is December, with an average of 9.1h of daylight.

What is the average length of the day in December in Milwaukee?

In Milwaukee, the average length of the day in December is 9.1h.

What is the month with the least sunshine in Milwaukee?

December has the least sunshine of the year in Milwaukee, with an average of 3.4h of sunshine.

How long on average sun shines in December in Milwaukee?

The average sunshine in December is 3.4h.

When is the lowest UV index in Milwaukee?

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

What is the UV index intensity in December in Milwaukee?

In Milwaukee, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unprotected exposure to the UV radiation.
Average temperature in December - Milwaukee, WI
  • Average high temperature in December: 32.8°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in December: 20.1°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (15.6°F).

Average humidity in December - Milwaukee, WI
  • Average humidity in December: 75.9%

The month with the highest relative humidity is December (75.9%).
Months with the lowest relative humidity are April and May (68.5%).

Average rainfall in December - Milwaukee, WI
  • Average rainfall in December: 2"

The wettest month (with the highest rainfall) is August (4").
The driest month (with the lowest rainfall) is February (1.7").

Average rainfall days in December - Milwaukee, WI
  • Average rainfall days in December: 10.9 days

The month with the highest number of rainy days is April (12.1 days).
The month with the lowest number of rainy days is September (8.8 days).

Average snowfall in December - Milwaukee, WI
  • Average snowfall in December: 10.6"

The month with the highest snowfall is January (14.7").
Months with the lowest snowfall are June, July, August and September (0").

Average snowfall days in December - Milwaukee, WI
  • Average snowfall days in December: 7.8 days

The month with the highest number of snowfall days is January (9.8 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in December - Milwaukee, WI
  • Average sea temperature in December: 40.1°F

The best month for swimming (with the highest average sea temperature) is August (71.9°F).
The coldest month (with the lowest average sea temperature) is February (36°F).

Average daylight in December / Average sunshine in December - Milwaukee, WI
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in December: 3.4h

The month with most sunshine is July (Average sunshine: 10.4h).
The month with least sunshine is December (Average sunshine: 3.4h).

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

Months with the highest UV index are June, July and August (UV index 8).
Months with the lowest UV index are January and December (UV index 1).