December weather forecast
Justice, IL

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Weather in December

The first month of the winter, December, is also an icy month in Justice, Illinois, with temperature in the range of an average low of 25.5°F (-3.6°C) and an average high of 35.2°F (1.8°C).

Temperature

With December's arrival, Justice sees a decrease in average high-temperatures, moving from a chilly 46.2°F (7.9°C) in November to a wintry 35.2°F (1.8°C). Justice's nights in December cool down to an average low-temperature of 25.5°F (-3.6°C).

Humidity

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

Rainfall

The months with the least rainfall in Justice, Illinois, are November and December Rain falls for 8.5 days and accumulates 1.77" (45mm) of rain.

Snowfall

Months with snowfall in Justice, Illinois, are January through April, October through December. In Justice, during December, snow falls for 9.6 days and regularly aggregates up to 2.76" (70mm) of snow. Throughout the year, in Justice, there are 47.1 snowfall days, and 19.02" (483mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Justice, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:59 am and sunset at 4:21 pm. On the last day of December, in Justice, sunrise is at 7:18 am and sunset at 4:30 pm CST.

Sunshine

In December, the average sunshine is 4.1h.

UV index

With an average maximum UV index of 1, December is the month with the lowest UV index in Justice. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 1 during December translates into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Updated: Feb 12, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

How cold is December in Justice?

Justice in December has an average high-temperature of 35.2°F (1.8°C) and an average low-temperature of 25.5°F (-3.6°C). In August, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, is calculated to be 84.2°F (29°C).

What is the average humidity in December in Justice?

In December, the average relative humidity is 80%.

What is the driest month in Justice?

November and December are months with the least rain in Justice, Illinois, when the rain falls for 8.5 days and typically aggregates up to 1.77" (45mm) of rain.

How many days does it rain in December in Justice?

In Justice, Illinois, in December, it is raining for 8.5 days, with typically 1.77" (45mm) of accumulated precipitation.

How much does it snow in Justice in December?

In December, in Justice, Illinois, it is snowing for 9.6 days. Throughout December, 2.76" (70mm) of snow is accumulated.

What is the month with the shortest days in Justice?

December has the shortest days of the year, with an average of 9h and 12min of daylight.

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

In Justice, the average day length in December is 9h and 13min.

What time are sunrise and sunset in December in Justice?

On the first day of December, sunrise is at 6:59 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:30 pm CST.

How long on average sun shines in December in Justice?

The average sunshine duration in December is 4.1h.

When is the lowest UV index in Justice?

The month with the lowest UV index is December, with an average maximum UV index of 1.

What is the UV index intensity in December in Justice?

In December, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a minimal hazard to health 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
Justice, IL

Average temperature in December - Justice, IL
  • Average high temperature in December: 35.2°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in December: 25.5°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 (18.3°F).

Average pressure in December
Justice, IL

Average pressure in December - Justice, IL
  • Average pressure in December: 30.09"Hg

The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in December
Justice, IL

Average wind speed in December - Justice, IL
  • Average wind speed in December: 9.4mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in December
Justice, IL

Average humidity in December - Justice, IL
  • Average humidity in December: 80%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Justice, IL

Average rainfall in December - Justice, IL
  • Average rainfall in December: 1.77"

The wettest month (with the highest rainfall) is May (4.61").
The driest months (with the least rainfall) are November and December (1.77").

Average rainfall days in December
Justice, IL

Average rainfall days in December - Justice, IL
  • Average rainfall days in December: 8.5 days

The month with the highest number of rainy days is June (19.4 days).
The month with the least rainy days is February (5.9 days).

Average snowfall in December
Justice, IL

Average snowfall in December - Justice, IL
  • Average snowfall in December: 2.76"

The month with the highest snowfall is February (5.28").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Justice, IL

Average snowfall days in December - Justice, IL
  • Average snowfall days in December: 9.6 days

The month with the highest number of snowfall days is January (13.3 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
Justice, IL

Average daylight in December / Average sunshine in December - Justice, IL
  • Average daylight in December: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

Average sunshine days in December
Justice, IL

Average sunshine days in December - Justice, IL
  • Average sunshine days in December: 14.3 days

The month with the most sunshine days is November (16.1 days).
The month with the least sunshine days is June (8.2 days).

Average UV index in December
Justice, IL

Average UV index in December - Justice, IL
  • Average UV index in December: 1

The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in December
Justice, IL

Average cloud cover in December - Justice, IL
  • Average cloud cover in December: 58

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in December
Justice, IL

Average visibility in December - Justice, IL
  • Average visibility in December: 6mi

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

Justice, Illinois, USA

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