December weather forecast
Bolingbrook, IL

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Weather in December

December in Bolingbrook signifies the full onset of winter with temperatures ranging from 24.6°F (-4.1°C) to 34.7°F (1.5°C). Snow starts to blanket the city, transforming it into a winter wonderland. The cold intensifies and daylight decreases further. Despite the snowfall and cold winds, the holiday season brings a unique charm to the city. Heavy winter clothing such as jackets, scarves, and gloves become essential.

Temperature

With December's onset, the weather shows a temperature decrease, transitioning from a frosty 46.6°F (8.1°C) in November to a cold 34.7°F (1.5°C). Nighttime temperature experiences an average drop to a freezing cold 24.6°F (-4.1°C) in December.

Humidity

In December, the average relative humidity is 81%.

Rainfall

The month with the least rainfall in Bolingbrook is December, when the rain falls for 7.1 days and typically collects 1.06" (27mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Bolingbrook, in December, snow falls for 9.7 days, with typically accumulated 1.89" (48mm) of snow. In Bolingbrook, during the entire year, snow falls for 44.4 days and aggregates up to 11.93" (303mm) of snow.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of December, sunrise is at 7:00 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:31 pm CST.

Sunshine

In Bolingbrook, the average sunshine in December is 4.1h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Enhance your sun protection with tightly woven, yet airy clothing. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

How cold is December in Bolingbrook?

In Bolingbrook, 34.7°F (1.5°C) is the average high-temperature and 24.6°F (-4.1°C) is the average low-temperature during December. In July, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 87.8°F (31°C).

What is the average humidity in December in Bolingbrook?

In December, the average relative humidity in Bolingbrook, Illinois, is 81%.

What is the driest month in Bolingbrook?

The month with the least rainfall in Bolingbrook, Illinois, is December, when the rain falls for 7.1 days and typically collects 1.06" (27mm) of precipitation.

How many days does it rain in December in Bolingbrook?

In Bolingbrook, in December, during 7.1 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

How many days does it snow in December in Bolingbrook?

In Bolingbrook, during December, snow falls for 9.7 days and regularly aggregates up to 1.89" (48mm) of snow.

What is the month with the shortest days in Bolingbrook?

The month with the shortest days is December, with an average of 9h and 12min of daylight.

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

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

What time are sunrise and sunset in December in Bolingbrook?

On the first day of December in Bolingbrook, Illinois, sunrise is at 7:00 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:31 pm CST.

How many hours of sunshine does Bolingbrook have in December?

The average sunshine duration in December in Bolingbrook, Illinois, is 4.1h.

When is the lowest UV index in Bolingbrook?

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

What is the UV index intensity in December in Bolingbrook?

In December, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's 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
Bolingbrook, IL

Average temperature in December - Bolingbrook, IL
  • Average high temperature in December: 34.7°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 (28.8°F).

  • Average low temperature in December: 24.6°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in December
Bolingbrook, IL

Average pressure in December - Bolingbrook, IL
  • Average pressure in December: 30.1"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).

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Average wind speed in December
Bolingbrook, IL

Average wind speed in December - Bolingbrook, IL
  • Average wind speed in December: 9mph

The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).

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Average humidity in December
Bolingbrook, IL

Average humidity in December - Bolingbrook, IL
  • Average humidity in December: 81%

The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in December
Bolingbrook, IL

Average rainfall in December - Bolingbrook, IL
  • Average rainfall in December: 1.06"

The wettest month (with the highest rainfall) is May (2.83").
The driest month (with the least rainfall) is December (1.06").

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Average rainfall days in December
Bolingbrook, IL

Average rainfall days in December - Bolingbrook, IL
  • Average rainfall days in December: 7.1 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (4.9 days).

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Average snowfall in December
Bolingbrook, IL

Average snowfall in December - Bolingbrook, IL
  • Average snowfall in December: 1.89"

The month with the highest snowfall is January (3.11").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Bolingbrook, IL

Average snowfall days in December - Bolingbrook, IL
  • Average snowfall days in December: 9.7 days

The month with the highest number of snowfall days is January (12.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Bolingbrook, IL

Average daylight in December / Average sunshine in December - Bolingbrook, 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 months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

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Average sunshine days in December
Bolingbrook, IL

Average sunshine days in December - Bolingbrook, IL
  • Average sunshine days in December: 16.2 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in December
Bolingbrook, IL

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

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

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Average cloud cover in December
Bolingbrook, IL

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

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in December
Bolingbrook, IL

Average visibility in December - Bolingbrook, 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).

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Bolingbrook, Illinois, USA

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