December weather forecast
La Prairie, IL

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Weather in December

December, the first month of the winter in La Prairie, is also an icy month, with temperature in the range of an average high of 38.5°F (3.6°C) and an average low of 26.8°F (-2.9°C).

Temperature

The move into December indicates a reduction in the average high-temperature, down from November's fresh 50.2°F (10.1°C) to a cold 38.5°F (3.6°C). December sees the temperature falling to a mean low of 26.8°F (-2.9°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

The months with the least rainfall are January and December Rain falls for 5.8 days and accumulates 1.02" (26mm) of rain.

Snowfall

January through April, October through December are months with snowfall. In La Prairie, Illinois, in December, during 5.5 snowfall days, 1.46" (37mm) of snow is typically accumulated. In La Prairie, during the entire year, snow falls for 27.6 days and aggregates up to 7.95" (202mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 24min of daylight.
On the first day of December, sunrise is at 7:07 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:48 pm CST.

Sunshine

In December, the average sunshine is 4.7h.

UV index

The months with the lowest UV index in La Prairie are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in December?

The high-temperature during December is 38.5°F (3.6°C) and the low-temperature is 26.8°F (-2.9°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in August is estimated at 91.4°F (33°C).

What is the average humidity in December?

The average relative humidity in December is 78%.

What is the driest month?

January and December are months with the least rain when the rain falls for 5.8 days and typically aggregates up to 1.02" (26mm) of rain.

How much does it rain in La Prairie in December?

In December, the rain falls for 5.8 days. Throughout December, 1.02" (26mm) of precipitation is accumulated.

How much does it snow in December?

In La Prairie, in December, during 5.5 snowfall days, 1.46" (37mm) of snow is typically accumulated.

What is the month with the shortest days?

With an average of 9h and 24min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In La Prairie, the average day length in December is 9h and 22min.

When is the sunrise / sunset in December?

On the first day of December, sunrise is at 7:07 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:48 pm CST.

How many hours of sunshine does La Prairie have in December?

In December, the average sunshine duration is 4.7h.

When is the lowest UV index?

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

What is the UV index intensity in December?

In La Prairie, Illinois, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat 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
La Prairie, IL

Average temperature in December - La Prairie, IL
  • Average high temperature in December: 38.5°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (32.7°F).

  • Average low temperature in December: 26.8°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure in December
La Prairie, IL

Average pressure in December - La Prairie, IL
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in December
La Prairie, IL

Average wind speed in December - La Prairie, IL
  • Average wind speed in December: 9.8mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

Average humidity in December
La Prairie, IL

Average humidity in December - La Prairie, IL
  • Average humidity in December: 78%

The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
La Prairie, IL

Average rainfall in December - La Prairie, IL
  • Average rainfall in December: 1.02"

The wettest month (with the highest rainfall) is May (3.35").
The driest months (with the least rainfall) are January and December (1.02").

Average rainfall days in December
La Prairie, IL

Average rainfall days in December - La Prairie, IL
  • Average rainfall days in December: 5.8 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (5 days).

Average snowfall in December
La Prairie, IL

Average snowfall in December - La Prairie, IL
  • Average snowfall in December: 1.46"

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
La Prairie, IL

Average snowfall days in December - La Prairie, IL
  • Average snowfall days in December: 5.5 days

The month with the highest number of snowfall days is January (8.8 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 Prairie, IL

Average daylight in December / Average sunshine in December - La Prairie, 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 24min).

  • Average sunshine in December: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in December
La Prairie, IL

Average sunshine days in December - La Prairie, IL
  • Average sunshine days in December: 19.6 days

The month with the most sunshine days is December (19.6 days).
The month with the least sunshine days is June (11.1 days).

Average UV index in December
La Prairie, IL

Average UV index in December - La Prairie, 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 Prairie, IL

Average cloud cover in December - La Prairie, IL
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 28).

Average visibility in December
La Prairie, IL

Average visibility in December - La Prairie, 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 Prairie, Illinois, USA

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