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 to December, the average high-temperature falls from a chilly 46.9°F (8.3°C) to a wintry 35.4°F (1.9°C). In Oak Forest, in December, the average low-temperature is a subzero cold 25.7°F (-3.5°C).Humidity
The average relative humidity in December in Oak Forest is 81%.Rainfall
The months with the least rainfall are January, February and December Rain falls for 4.8 days and accumulates 0.55" (14mm) of rain.Snowfall
Months with snowfall in Oak Forest are January through April, October through December. In December, it is snowing for 6.6 days. Throughout December, 0.47" (12mm) of snow is accumulated. In Oak Forest, during the entire year, snow falls for 34.2 days and aggregates up to 4.8" (122mm) of snow.Daylight
With an average of 9h and 12min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:58 am and sunset at 4:21 pm. On the last day of December, in Oak Forest, sunrise is at 7:17 am and sunset at 4:31 pm CST.
Sunshine
The average sunshine in December 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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 1 during December translates into the following guidance:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Enhance your sun protection with tightly woven, yet airy clothing. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Frequently asked questions
How cold is December in Oak Forest?
What is the average humidity in December in Oak Forest?
What is the driest month in Oak Forest?
How many days does it rain in December in Oak Forest?
How many days does it snow in December in Oak Forest?
What is the month with the shortest days in Oak Forest?
How many hours of daylight does Oak Forest have in December?
When is the sunrise / sunset in December in Oak Forest?
How long on average sun shines in December in Oak Forest?
What are the months with the lowest UV index in Oak Forest?
What is the UV index intensity in December in Oak Forest?
Average temperature in December
Oak Forest, IL
- Average high temperature in December: 35.4°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 25.7°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Oak Forest, IL
- Average pressure in December: 30.1"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 Forest, 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 (6.2mph).
Average humidity in December
Oak Forest, IL
- Average humidity in December: 81%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in December
Oak Forest, IL
- Average rainfall in December: 0.55"
The wettest month (with the highest rainfall) is May (1.54").
The driest months (with the least rainfall) are January, February and December (0.55").
Average rainfall days in December
Oak Forest, IL
- Average rainfall days in December: 4.8 days
The month with the highest number of rainy days is July (14.1 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in December
Oak Forest, IL
- Average snowfall in December: 0.47"
The month with the highest snowfall is January (1.3").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Oak Forest, IL
- Average snowfall days in December: 6.6 days
The month with the highest number of snowfall days is January (10.3 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 Forest, IL
- Average daylight in December: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 6min).
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 August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in December
Oak Forest, IL
- Average sunshine days in December: 20.6 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in December
Oak Forest, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in December
Oak Forest, IL
- Average cloud cover in December: 58
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Oak Forest, 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).
Oak Forest, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
