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
With December's arrival, Arlington Heights's weather changes as the average high-temperature falls from a chilly 45.5°F (7.5°C) in November to an icy 34.3°F (1.3°C). An average low-temperature of 24.8°F (-4°C) is noted during the month of December.Humidity
In December, the average relative humidity is 80%.Rainfall
In Arlington Heights, during December, the rain falls for 9.1 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Arlington Heights, during the entire year, the rain falls for 142.7 days and collects up to 27.91" (709mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Arlington Heights, in December, during 10.9 snowfall days, 3.23" (82mm) of snow is typically accumulated. Throughout the year, in Arlington Heights, Illinois, there are 48.8 snowfall days, and 21.02" (534mm) of snow is accumulated.Daylight
December has the shortest days of the year, 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 4:21 pm. On the last day of December, in Arlington Heights, sunrise is at 7:20 am and sunset at 4:30 pm CST.
Sunshine
The average sunshine in December in Arlington Heights is 4h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the average maximum UV index of 1 translates into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold is it in Arlington Heights in December?
What is the average humidity in December in Arlington Heights?
How many days does it rain in December in Arlington Heights?
How many days does it snow in December in Arlington Heights?
What is the month with the shortest days in Arlington Heights?
How many hours of daylight does Arlington Heights have in December?
When are sunrise and sunset in December in Arlington Heights?
How long on average sun shines in December in Arlington Heights?
When is the lowest UV index in Arlington Heights?
What is the UV index reading in December in Arlington Heights?
Average temperature in December
Arlington Heights, IL
- Average high temperature in December: 34.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.9°F).
- Average low temperature in December: 24.8°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).
Average pressure in December
Arlington Heights, 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
Arlington Heights, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Arlington Heights, IL
- Average humidity in December: 80%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Arlington Heights, IL
- Average rainfall in December: 1.65"
The wettest months (with the highest rainfall) are April and May (3.46").
The driest month (with the least rainfall) is November (1.57").
Average rainfall days in December
Arlington Heights, IL
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in December
Arlington Heights, IL
- Average snowfall in December: 3.23"
The month with the highest snowfall is February (5.71").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Arlington Heights, IL
- Average snowfall days in December: 10.9 days
The month with the highest number of snowfall days is January (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Arlington Heights, 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 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Arlington Heights, IL
- Average sunshine days in December: 14.5 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in December
Arlington Heights, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Arlington Heights, 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 and August (Cloud cover 30).
Average visibility in December
Arlington Heights, IL
- Average visibility in December: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Arlington Heights, Illinois, USA
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