December weather forecast
Gibsonia, IL

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Weather in December

December, the first month of the winter in Gibsonia, is still a chilly month, with temperature in the range of an average low of 32.9°F (0.5°C) and an average high of 44.6°F (7°C).

Temperature

Gibsonia's progression into December involves a drop in the average high-temperature, receding from a cool 54.1°F (12.3°C) in November to a frosty 44.6°F (7°C). The low-temperature averages to a cold 32.9°F (0.5°C) during the nights of December.

Humidity

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

Rainfall

In Gibsonia, during December, the rain falls for 10.4 days and regularly aggregates up to 2.05" (52mm) of precipitation. Throughout the year, in Gibsonia, there are 146.3 rainfall days, and 24.96" (634mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In December, in Gibsonia, it is snowing for 3.5 days. Throughout December, 0.63" (16mm) of snow is accumulated. In Gibsonia, during the entire year, snow falls for 15.9 days and aggregates up to 3.58" (91mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 6:49 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:07 am and sunset at 4:44 pm CST.

Sunshine

In Gibsonia, the average sunshine in December is 4.7h.

UV index

The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Updated: Jul 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December?

December temperatures vary between a high-temperature of 44.6°F (7°C) and a low-temperature of 32.9°F (0.5°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in August is estimated at 95°F (35°C).

What is the average humidity in December?

In December, the average relative humidity is 78%.

How much does it rain in December?

In Gibsonia, Illinois, in December, it is raining for 10.4 days, with typically 2.05" (52mm) of accumulated precipitation.

How much does it snow in December?

In December, it is snowing for 3.5 days. Throughout December, 0.63" (16mm) of snow is accumulated.

What is the month with the shortest days?

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

What is the average length of the day in December?

In Gibsonia, the average day length in December is 9h and 37min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:49 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 4:44 pm CST.

How long on average sun shines in December?

In December, the average sunshine duration is 4.7h.

What is the month with the lowest UV index in Gibsonia?

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

What is the UV index reading in December?

In Gibsonia, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to 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
Gibsonia, IL

Average temperature in December - Gibsonia, IL
  • Average high temperature in December: 44.6°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in December: 32.9°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 (26.8°F).

Average pressure in December
Gibsonia, IL

Average pressure in December - Gibsonia, 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 (29.95"Hg).

Average wind speed in December
Gibsonia, IL

Average wind speed in December - Gibsonia, IL
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in December
Gibsonia, IL

Average humidity in December - Gibsonia, 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 (70%).

Average rainfall in December
Gibsonia, IL

Average rainfall in December - Gibsonia, IL
  • Average rainfall in December: 2.05"

The wettest month (with the highest rainfall) is April (3.27").
The driest month (with the least rainfall) is September (1.14").

Average rainfall days in December
Gibsonia, IL

Average rainfall days in December - Gibsonia, IL
  • Average rainfall days in December: 10.4 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (9 days).

Average snowfall in December
Gibsonia, IL

Average snowfall in December - Gibsonia, IL
  • Average snowfall in December: 0.63"

The month with the highest snowfall is February (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in December
Gibsonia, IL

Average snowfall days in December - Gibsonia, IL
  • Average snowfall days in December: 3.5 days

The month with the highest number of snowfall days is January (4.8 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
Gibsonia, IL

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

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 4h and 4min

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

Average sunshine days in December
Gibsonia, IL

Average sunshine days in December - Gibsonia, IL
  • Average sunshine days in December: 17.2 days

The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is May (11.2 days).

Average UV index in December
Gibsonia, IL

Average UV index in December - Gibsonia, 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
Gibsonia, IL

Average cloud cover in December - Gibsonia, IL
  • Average cloud cover in December: 50

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in December
Gibsonia, IL

Average visibility in December - Gibsonia, 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).

Gibsonia, Illinois, USA

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