December weather forecast
Du Bois, IL

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Weather in December

December, the first month of the winter in Du Bois, is still a chilly month, with an average temperature fluctuating between 30.7°F (-0.7°C) and 42.8°F (6°C).

Temperature

The average high-temperature drops in December, from November's cool 53.1°F (11.7°C) to a chilly 42.8°F (6°C). Du Bois's nights in December experience an average temperature drop to a subzero cold 30.7°F (-0.7°C).

Humidity

The average relative humidity in December is 78%.

Rainfall

In Du Bois, in December, during 9.2 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Du Bois, during the entire year, the rain falls for 166.8 days and collects up to 37.83" (961mm) of precipitation.

Snowfall

January through April, September, November and December are months with snowfall in Du Bois. In Du Bois, during December, snow falls for 4.5 days and regularly aggregates up to 1.3" (33mm) of snow. Throughout the year, there are 23.2 snowfall days, and 7.87" (200mm) of snow is accumulated.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:55 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:46 pm CST.

Sunshine

The average sunshine in December in Du Bois is 4.8h.

UV index

The months with the lowest UV index in Du Bois are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In December, an average UV index of 2 transforms into the following instructions:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Updated: Jun 26, 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 42.8°F (6°C) and the low-temperature is 30.7°F (-0.7°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is evaluated at 95°F (35°C).

What is the average humidity in December?

In Du Bois, the average relative humidity in December is 78%.

How many days does it rain in December?

In Du Bois, in December, it is raining for 9.2 days, with typically 2.56" (65mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 4.5 days. Throughout December, 1.3" (33mm) of snow is accumulated.

What is the month with the shortest days?

With an average of 9h and 36min of daylight, December has the shortest days of the year.

What is the average length of the day in December?

In Du Bois, the average day length in December is 9h and 34min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:55 am and sunset at 4:37 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 4:46 pm CST.

How many hours of sunshine does Du Bois have in December?

The average sunshine duration in December is 4.8h.

What is the month with the lowest UV index?

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

How high is the UV index in December?

In December, the average daily maximum UV index in Du Bois is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe 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
Du Bois, IL

Average temperature in December - Du Bois, IL
  • Average high temperature in December: 42.8°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.9°F).

  • Average low temperature in December: 30.7°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in December
Du Bois, IL

Average pressure in December - Du Bois, IL
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Du Bois, IL

Average wind speed in December - Du Bois, IL
  • Average wind speed in December: 8.9mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity in December
Du Bois, IL

Average humidity in December - Du Bois, IL
  • Average humidity in December: 78%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Du Bois, IL

Average rainfall in December - Du Bois, IL
  • Average rainfall in December: 2.56"

The wettest month (with the highest rainfall) is April (4.45").
The driest month (with the least rainfall) is February (2.01").

Average rainfall days in December
Du Bois, IL

Average rainfall days in December - Du Bois, IL
  • Average rainfall days in December: 9.2 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is December (9.2 days).

Average snowfall in December
Du Bois, IL

Average snowfall in December - Du Bois, IL
  • Average snowfall in December: 1.3"

The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and October (0").

Average snowfall days in December
Du Bois, IL

Average snowfall days in December - Du Bois, IL
  • Average snowfall days in December: 4.5 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July and August (0 days).

Average daylight in December /
Average sunshine in December
Du Bois, IL

Average daylight in December / Average sunshine in December - Du Bois, IL
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 4h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

Average sunshine days in December
Du Bois, IL

Average sunshine days in December - Du Bois, IL
  • Average sunshine days in December: 17 days

The months with the most sunshine days are October and November (17.5 days).
The month with the least sunshine days is May (9.3 days).

Average UV index in December
Du Bois, IL

Average UV index in December - Du Bois, IL
  • Average UV index in December: 2

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

Average cloud cover in December
Du Bois, IL

Average cloud cover in December - Du Bois, IL
  • Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).

Average visibility in December
Du Bois, IL

Average visibility in December - Du Bois, 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).

Du Bois, Illinois, USA

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