December weather forecast
La Crosse, IL

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Weather in December

The first month of the winter, December, is also an icy month in La Crosse, Illinois, with an average temperature varying between 37°F (2.8°C) and 25.5°F (-3.6°C).

Temperature

December's arrival corresponds with a decrease in average high-temperatures, from November's chilly 48.9°F (9.4°C) to a cold 37°F (2.8°C). In La Crosse, the December nights cool down to an average low of 25.5°F (-3.6°C).

Humidity

In December, the average relative humidity is 79%.

Rainfall

In La Crosse, Illinois, in December, during 5.6 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In La Crosse, during the entire year, the rain falls for 127.6 days and collects up to 21.02" (534mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall. In December, it is snowing for 5.4 days. Throughout December, 1.3" (33mm) of snow is accumulated. In La Crosse, during the entire year, snow falls for 26.4 days and aggregates up to 9.06" (230mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:08 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:47 pm CST.

Sunshine

In December, the average sunshine is 4.5h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index of 2 during December leads to these instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. Around midday, solar radiation is most harmful; hence, exposure should be limited. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Updated: Jun 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

December temperatures in La Crosse vary between a high-temperature of 37°F (2.8°C) and a low-temperature of 25.5°F (-3.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in August is appraised at 89.6°F (32°C).

What is the average humidity in December?

In December, the average relative humidity is 79%.

How many days does it rain in December?

In La Crosse, in December, it is raining for 5.6 days, with typically 0.98" (25mm) of accumulated precipitation.

How many days does it snow in December in La Crosse?

In December, it is snowing for 5.4 days. Throughout December, 1.3" (33mm) of snow is accumulated.

What is the month with the shortest days in La Crosse?

With an average of 9h and 18min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In December, the average day length is 9h and 20min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 7:08 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:47 pm CST.

How long on average sun shines in December?

In La Crosse, the average sunshine duration in December is 4.5h.

What are the months with the lowest UV index?

The months with the lowest UV index in La Crosse are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in December in La Crosse?

The average daily maximum UV index in December is 2. 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
La Crosse, IL

Average temperature in December - La Crosse, IL
  • Average high temperature in December: 37°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (30.9°F).

  • Average low temperature in December: 25.5°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

Average pressure in December
La Crosse, IL

Average pressure in December - La Crosse, IL
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in December
La Crosse, IL

Average wind speed in December - La Crosse, IL
  • Average wind speed in December: 10.1mph

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

Average humidity in December
La Crosse, IL

Average humidity in December - La Crosse, IL
  • Average humidity in December: 79%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
La Crosse, IL

Average rainfall in December - La Crosse, IL
  • Average rainfall in December: 0.98"

The wettest month (with the highest rainfall) is May (3.11").
The driest month (with the least rainfall) is January (0.83").

Average rainfall days in December
La Crosse, IL

Average rainfall days in December - La Crosse, IL
  • Average rainfall days in December: 5.6 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.3 days).

Average snowfall in December
La Crosse, IL

Average snowfall in December - La Crosse, IL
  • Average snowfall in December: 1.3"

The month with the highest snowfall is January (3.15").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
La Crosse, IL

Average snowfall days in December - La Crosse, IL
  • Average snowfall days in December: 5.4 days

The month with the highest number of snowfall days is January (8.5 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
La Crosse, IL

Average daylight in December / Average sunshine in December - La Crosse, IL
  • Average daylight in December: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in December: 4h and 3min

The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

Average sunshine days in December
La Crosse, IL

Average sunshine days in December - La Crosse, IL
  • Average sunshine days in December: 20 days

The month with the most sunshine days is December (20 days).
The months with the least sunshine days are May and June (11.8 days).

Average UV index in December
La Crosse, IL

Average UV index in December - La Crosse, IL
  • Average UV index in December: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in December
La Crosse, IL

Average cloud cover in December - La Crosse, IL
  • Average cloud cover in December: 51

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).

Average visibility in December
La Crosse, IL

Average visibility in December - La Crosse, IL
  • 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).

La Crosse, Illinois, USA

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