December weather forecastOak Lawn, IL
December
Weather in December
December marks the introduction of intense winter in Oak Lawn, Illinois with temperatures dropping to 35.2°F (1.8°C). Snowfall dominates the landscape, providing a white Christmas to the city. Despite the falling temperature and decreasing daylight, the city glows with festive lights and holiday spirit. While outside may be cold, the community warmth makes Oak Lawn an enchanting place in December.Temperature
The transition into December in Oak Lawn is accompanied by a temperature decrease, with the average high-temperature shifting from a chilly 46.2°F (7.9°C) in November to a wintry 35.2°F (1.8°C). During the month of December, Oak Lawn's average nighttime temperature closely mirrors its daytime counterpart, at a subzero cold 26.4°F (-3.1°C).Humidity
In Oak Lawn, Illinois, the average relative humidity in December is 80%.Rainfall
December is the month with the least rainfall. Rain falls for 7.4 days and accumulates 1.02" (26mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In December, it is snowing for 9.4 days. Throughout December, 1.5" (38mm) of snow is accumulated. In Oak Lawn, Illinois, during the entire year, snow falls for 42.4 days and aggregates up to 11.61" (295mm) 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 December, sunrise is at 6:59 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 4:30 pm CST.
Sunshine
In December, the average sunshine is 4.2h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 1. A UV Index reading 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 translates into these guidelines:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Oak Lawn, IL
- Average high temperature in December: 35.2°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.5°F).
- Average low temperature in December: 26.4°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in December
Oak Lawn, 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
Oak Lawn, IL
- Average wind speed in December: 9.9mph
The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Oak Lawn, 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 (72%).
Average rainfall in December
Oak Lawn, IL
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is December (1.02").
Average rainfall days in December
Oak Lawn, IL
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Oak Lawn, IL
- Average snowfall in December: 1.5"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Oak Lawn, IL
- Average snowfall days in December: 9.4 days
The month with the highest number of snowfall days is January (11.8 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
Oak Lawn, IL
- Average daylight in December: 9h and 12min
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 12min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Oak Lawn, IL
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in December
Oak Lawn, 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
Oak Lawn, IL
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Oak Lawn, 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).
