December weather forecastCornland, IL
December
Weather in December
The first month of the winter, December, is still a cold month in Cornland, Illinois, with an average temperature fluctuating between 38.3°F (3.5°C) and 27.5°F (-2.5°C).Temperature
With the onset of December, Cornland experiences a modest temperature adjustment, with the average high-temperature receding from a chilly 49.8°F (9.9°C) in November to a cold 38.3°F (3.5°C). During the month of December, the temperature falls to an average of 27.5°F (-2.5°C).Humidity
The average relative humidity in December is 79%.Rainfall
The month with the least rainfall is December, when the rain falls for 8.3 days and typically collects 1.1" (28mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Cornland, in December, snow falls for 6.7 days, with typically accumulated 1.02" (26mm) of snow. Throughout the year, there are 29.7 snowfall days, and 7.13" (181mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:00 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:42 pm CST.
Sunshine
In Cornland, the average sunshine in December is 4.5h.UV index
In December, the average daily maximum UV index in Cornland is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 during December leads to these advisories:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be watchful! The reflection of snow can enhance the intensity of 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
Cornland, IL
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in December
Cornland, IL
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Cornland, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in December
Cornland, IL
- Average humidity in December: 79%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Cornland, IL
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is December (1.1").
Average rainfall days in December
Cornland, IL
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and February (6.3 days).
Average snowfall in December
Cornland, IL
- Average snowfall in December: 1.02"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Cornland, IL
- Average snowfall days in December: 6.7 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Cornland, IL
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 4h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Cornland, IL
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Cornland, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in December
Cornland, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June and September (Cloud cover 31).
Average visibility in December
Cornland, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
