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
Setting in of December comes with a decrease in the average high-temperature, moving from a chilly 45.5°F (7.5°C) in November to a cold 34.2°F (1.2°C). In West Chicago, an average low-temperature of 23.5°F (-4.7°C) is recorded during December nights.Humidity
In West Chicago, the average relative humidity in December is 82%.Rainfall
November and December are months with the least rain when the rain falls for 5 days and typically aggregates up to 0.39" (10mm) of rain.Snowfall
January through April, October through December are months with snowfall. In West Chicago, Illinois, during December, snow falls for 5.6 days and regularly aggregates up to 0.35" (9mm) of snow. Throughout the year, there are 28.3 snowfall days, and 3.74" (95mm) of snow is accumulated.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year in West Chicago, Illinois.On the first day of December in West Chicago, Illinois, sunrise is at 7:01 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:31 pm CST.
Sunshine
In West Chicago, the average sunshine in December is 4.1h.UV index
The months with the lowest UV index in West Chicago are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Frequently asked questions
How cold is December in West Chicago?
What is the average humidity in December in West Chicago?
What is the driest month in West Chicago?
How much does it rain in West Chicago in December?
How much does it snow in West Chicago in December?
What is the month with the shortest days in West Chicago?
How many hours of daylight does West Chicago have in December?
What time are sunrise and sunset in December in West Chicago?
How many hours of sunshine does West Chicago have in December?
What are the months with the lowest UV index in West Chicago?
What is the UV index intensity in December in West Chicago?
Average temperature in December
West Chicago, IL
- Average high temperature in December: 34.2°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 23.5°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in December
West Chicago, 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
West Chicago, IL
- Average wind speed in December: 9.2mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity in December
West Chicago, IL
- Average humidity in December: 82%
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
West Chicago, IL
- Average rainfall in December: 0.39"
The wettest month (with the highest rainfall) is May (1.26").
The driest months (with the least rainfall) are November and December (0.39").
Average rainfall days in December
West Chicago, IL
- Average rainfall days in December: 5 days
The month with the highest number of rainy days is May (12.4 days).
The month with the least rainy days is January (3.4 days).
Average snowfall in December
West Chicago, IL
- Average snowfall in December: 0.35"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
West Chicago, IL
- Average snowfall days in December: 5.6 days
The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
West Chicago, 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 month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
West Chicago, IL
- Average sunshine days in December: 22.4 days
The month with the most sunshine days is December (22.4 days).
The month with the least sunshine days is June (13.3 days).
Average UV index in December
West Chicago, 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
West Chicago, IL
- Average cloud cover in December: 59
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
West Chicago, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
West Chicago, Illinois, USA
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