December weather forecastBloomington, IL
December
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
With December's onset, the average high-temperature recedes from November's chilly 47.7°F (8.7°C) to a wintry 36.5°F (2.5°C). The mean low-temperature during December nights is a freezing cold 26.2°F (-3.2°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Bloomington, during December, the rain falls for 7.1 days and regularly aggregates up to 1.22" (31mm) of precipitation. Throughout the year, there are 140.6 rainfall days, and 22.44" (570mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Bloomington, Illinois, in December, snow falls for 8 days, with typically accumulated 1.65" (42mm) of snow. Throughout the year, in Bloomington, Illinois, there are 35.4 snowfall days, and 9.45" (240mm) of snow is accumulated.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December, 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 Bloomington, the average sunshine in December 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 value of 2, and less, symbolizes a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 in December translates into these instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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: 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: 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: 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: 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: 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: 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: 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: 9h and 18min
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 6min
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: 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: 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: 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: 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).
