December weather forecast
Bloomington, IL

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Weather in December

December is characterized by consistent cold weather in Bloomington, Illinois, making it a true winter month. With an average high temperature of 36.5°F (2.5°C), the city enters the depths of winter. The concentration of cloud coverage increases with the frequency of snowfall, adding to the winter charm. Despite the short days, the winter solstice is appreciated for bringing forth the longest night of the year. As December progresses, the city becomes synonymous with a winter wonderland, closing out the year with a chilly goodbye.

Temperature

Onset of December in Bloomington witnesses a reduction in the average high-temperature, falling from a frosty 47.7°F (8.7°C) in November to a cold 36.5°F (2.5°C). Bloomington's nighttime temperature in December falls to an average of 26.2°F (-3.2°C).

Humidity

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

Rainfall

In Bloomington, in December, during 7.1 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Bloomington, during the entire year, the rain falls for 140.6 days and collects up to 22.44" (570mm) of precipitation.

Snowfall

January through April, October through December are months with snowfall in Bloomington. In Bloomington, in December, snow falls for 8 days, with typically accumulated 1.65" (42mm) of snow. In Bloomington, during the entire year, snow falls for 35.4 days and aggregates up to 9.45" (240mm) of snow.

Daylight

With an average of 9h and 18min of daylight, December has the shortest days of the year in Bloomington.
On the first day of December in Bloomington, sunrise is at 7:00 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:39 pm CST.

Sunshine

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

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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 2 in December translates into these instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. To guard against the harmful effects of the Sun, minimize exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is December in Bloomington?

An average high-temperature, in December, in Bloomington, is 36.5°F (2.5°C) and the average low-temperature is 26.2°F (-3.2°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in July is appraised at 86°F (30°C).

What is the average humidity in December in Bloomington?

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

How much does it rain in Bloomington in December?

In Bloomington, Illinois, during December, the rain falls for 7.1 days and regularly aggregates up to 1.22" (31mm) of precipitation.

How much does it snow in Bloomington in December?

In Bloomington, Illinois, in December, during 8 snowfall days, 1.65" (42mm) of snow is typically accumulated.

What is the month with the shortest days in Bloomington?

The month with the shortest days in Bloomington is December, with an average of 9h and 18min of daylight.

How many hours of daylight does Bloomington have in December?

The average day length in December in Bloomington is 9h and 20min.

What time are sunrise and sunset in December in Bloomington?

On the first day of December in Bloomington, sunrise is at 7:00 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:39 pm CST.

How many hours of sunshine does Bloomington have in December?

In December, the average sunshine duration in Bloomington, Illinois, is 4.1h.

What are the months with the lowest UV index in Bloomington?

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

What is the UV index intensity in December in Bloomington?

The average daily maximum UV index in December in Bloomington is 2. 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
Bloomington, IL

Average temperature in December - Bloomington, IL
  • Average high temperature in December: 36.5°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in December: 26.2°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in December
Bloomington, IL

Average pressure in December - Bloomington, IL
  • Average pressure in December: 30.11"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).

Average wind speed in December
Bloomington, IL

Average wind speed in December - Bloomington, IL
  • Average wind speed in December: 10.5mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in December
Bloomington, IL

Average humidity in December - Bloomington, 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 (71%).

Average rainfall in December
Bloomington, IL

Average rainfall in December - Bloomington, IL
  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is January (1.18").

Average rainfall days in December
Bloomington, IL

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

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is February (5.3 days).

Average snowfall in December
Bloomington, IL

Average snowfall in December - Bloomington, IL
  • Average snowfall in December: 1.65"

The month with the highest snowfall is January (2.44").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in December
Bloomington, IL

Average snowfall days in December - Bloomington, IL
  • Average snowfall days in December: 8 days

The month with the highest number of snowfall days is January (11.5 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
Bloomington, IL

Average daylight in December / Average sunshine in December - Bloomington, 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 18min).

  • Average sunshine in December: 4h and 1min

The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in December
Bloomington, IL

Average sunshine days in December - Bloomington, IL
  • Average sunshine days in December: 16.6 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.7 days).

Average UV index in December
Bloomington, IL

Average UV index in December - Bloomington, 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).

Average cloud cover in December
Bloomington, IL

Average cloud cover in December - Bloomington, IL
  • Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 33).

Average visibility in December
Bloomington, IL

Average visibility in December - Bloomington, 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).

Bloomington, Illinois, USA

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