Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Carol Stream's progression into December includes a drop in the average high-temperature, from a frosty 45.5°F (7.5°C) in November to a wintry 34.3°F (1.3°C). Throughout December, the average low-temperature dips to a freezing cold 24.1°F (-4.4°C).Humidity
In December, the average relative humidity is 81%.Rainfall
February, November and December are months with the least rain in Carol Stream when the rain falls for 5.7 days and typically aggregates up to 0.51" (13mm) of rain.Snowfall
Months with snowfall in Carol Stream are January through April, October through December. In Carol Stream, Illinois, during December, snow falls for 7.1 days and regularly aggregates up to 0.47" (12mm) of snow. In Carol Stream, Illinois, during the entire year, snow falls for 34.4 days and aggregates up to 5.2" (132mm) 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 the month, sunrise is at 7:01 am and sunset at 4:22 pm. On the last day of December, sunrise is at 7:20 am and sunset at 4:31 pm CST.
Sunshine
In December, the average sunshine is 4.1h.UV index
January and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
How cold is December in Carol Stream?
What is the average humidity in December in Carol Stream?
What is the driest month in Carol Stream?
How much does it rain in Carol Stream in December?
How much does it snow in Carol Stream in December?
What is the month with the shortest days in Carol Stream?
What is the average length of the day in December in Carol Stream?
When is the sunrise / sunset in December in Carol Stream?
How many hours of sunshine does Carol Stream have in December?
What is the month with the lowest UV index in Carol Stream?
What is the UV index reading in December in Carol Stream?
Average temperature in December
Carol Stream, IL
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in December
Carol Stream, 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
Carol Stream, IL
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Carol Stream, 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 (74%).
Average rainfall in December
Carol Stream, IL
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (1.65").
The driest months (with the least rainfall) are February, November and December (0.51").
Average rainfall days in December
Carol Stream, IL
- Average rainfall days in December: 5.7 days
The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in December
Carol Stream, IL
- Average snowfall in December: 0.47"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Carol Stream, IL
- Average snowfall days in December: 7.1 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Carol Stream, 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 42min).
Average sunshine days in December
Carol Stream, IL
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in December
Carol Stream, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Carol Stream, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July, August and September (Cloud cover 32).
Average visibility in December
Carol Stream, 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).
Carol Stream, Illinois, USA
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