December weather - Winter 2024

Weather in December
Frequently asked questions
Average temperature in December
Average pressure in December
Average wind speed in December
Average humidity in December
Average rainfall in December
Average rainfall days in December
Average snowfall in December
Average snowfall days in December
Average daylight in December
Average sunshine in December
Average sunshine days in December
Average UV index in December
Average cloud cover in December
Average visibility in December

An old building that works as an auditorium within the University of Illinois in Champaign

Weather in December

December in Champaign ushers in the deep winter chill and short days characteristic of the year-end. The cold weather from November intensifies this month, with temperatures taking a substantial dip. It also records an increase in snowfall, standing at 1.1" (28mm), the highest since the start of the year. Reduced daylight hours, lower average sunshine duration, and increased cloud cover underpin the wintry ambiance. As the year draws to a close, the weather turns colder, paving the way for a new cycle of seasons in the coming year.

Temperature

In December, the meteorological conditions in Champaign alter, with the average high-temperature shifting from a chilly 49.1°F (9.5°C) in November to a wintry 37.6°F (3.1°C). An average temperature of 27.7°F (-2.4°C) marks the nights in Champaign, Illinois, in December.

Humidity

In Champaign, the average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 7 days. Throughout December, 0.98" (25mm) of precipitation is accumulated. In Champaign, during the entire year, the rain falls for 129.9 days and collects up to 18.15" (461mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Champaign, Illinois. In December, it is snowing for 5.9 days. Throughout December, 1.1" (28mm) of snow is accumulated. Throughout the year, there are 27.1 snowfall days, and 5.91" (150mm) of snow is accumulated.

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 6:56 am and sunset at 4:27 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 4:37 pm CST.

Sunshine

In Champaign, the average sunshine in December 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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 2 in December translates into these instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. To cut down UV radiation exposure by about half, sport a wide-brim hat. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

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Frequently asked questions

Is it cold in Champaign during December?

The high-temperature in Champaign during December is 37.6°F (3.1°C) and the low-temperature is 27.7°F (-2.4°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in August is estimated at 86°F (30°C).

What is the average humidity in December in Champaign?

In Champaign, the average relative humidity in December is 80%.

How many days does it rain in December in Champaign?

In Champaign, Illinois, in December, during 7 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.

How many days does it snow in December in Champaign?

In Champaign, in December, snow falls for 5.9 days, with typically accumulated 1.1" (28mm) of snow.

What is the month with the shortest days in Champaign?

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

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

The average day length in December is 9h and 22min.

What time are sunrise and sunset in December in Champaign?

In December, on the first day of the month, sunrise is at 6:56 am and sunset at 4:27 pm. On the last day of the month, in Champaign, Illinois, sunrise is at 7:15 am and sunset at 4:37 pm CST.

How long on average sun shines in December in Champaign?

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

When is the lowest UV index in Champaign?

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

How high is the UV index in December in Champaign?

In December, the average daily maximum UV index in Champaign is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

49.1°F 9.5°C

37.6°F 3.1°C

31.8°F -0.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

10.9mph 17.5km/h

10.8mph 17.4km/h

11.5mph 18.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

19.7

18.5

18.3

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Champaign, IL

Average high temperature in December: 37.6°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.8°F).

Average low temperature in December: 27.7°F

The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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Average pressure in December
Champaign, IL

Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in December
Champaign, IL

Average wind speed in December: 10.1mph

The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in December
Champaign, IL

Average humidity in December: 80%

The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in December
Champaign, IL

Average rainfall in December: 0.98"

The wettest month (with the highest rainfall) is April (2.24").
The driest month (with the least rainfall) is September (0.94").

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Average rainfall days in December
Champaign, IL

Average rainfall days in December: 7 days

The month with the highest number of rainy days is May (15.3 days).
The months with the least rainy days are January and February (6 days).

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Average snowfall in December
Champaign, IL

Average snowfall in December: 1.1"

The month with the highest snowfall is January (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Champaign, IL

Average snowfall days in December: 5.9 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Champaign, 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 3min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

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Average sunshine days in December
Champaign, IL

Average sunshine days in December: 18.5 days

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in December
Champaign, 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).

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Average cloud cover in December
Champaign, IL

Average cloud cover in December: 54

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and September (Cloud cover 31).

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Average visibility in December
Champaign, IL

Average visibility in December: 6mi

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

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December weather forecast
Champaign, IL

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