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
As November transitions into December, Carpentersville sees a drop in the average high-temperature, transitioning from a frosty 45.1°F (7.3°C) to a wintry 33.3°F (0.7°C). During December, an average low-temperature of 23.2°F (-4.9°C) is observed.Humidity
In December, the average relative humidity is 82%.Rainfall
December is the month with the least rainfall. Rain falls for 6.5 days and accumulates 0.67" (17mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. In Carpentersville, during December, snow falls for 9.1 days and regularly aggregates up to 1.06" (27mm) of snow. Throughout the year, there are 43.2 snowfall days, and 7.4" (188mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in Carpentersville.On the first day of December, sunrise is at 7:02 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:31 pm CST.
Sunshine
In December, the average sunshine is 3.9h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the maximum UV index of 1 suggests this advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. During bright days, sunglasses that offer UVA and UVB defense are recommended. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December in Carpentersville?
What is the driest month?
How many days does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Carpentersville, IL
- Average high temperature in December: 33.3°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in December: 23.2°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in December
Carpentersville, 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
Carpentersville, IL
- Average wind speed in December: 9.2mph
The windiest months (with the highest average wind speed) are January and February (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
Carpentersville, IL
- Average humidity in December: 82%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (76%).
Average rainfall in December
Carpentersville, IL
- Average rainfall in December: 0.67"
The wettest months (with the highest rainfall) are April and August (1.89").
The driest month (with the least rainfall) is December (0.67").
Average rainfall days in December
Carpentersville, IL
- Average rainfall days in December: 6.5 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in December
Carpentersville, IL
- Average snowfall in December: 1.06"
The month with the highest snowfall is January (2.01").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Carpentersville, IL
- Average snowfall days in December: 9.1 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Carpentersville, 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: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Carpentersville, IL
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Carpentersville, IL
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Carpentersville, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are July, August and September (Cloud cover 32).
Average visibility in December
Carpentersville, IL
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Carpentersville, Illinois, USA
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