December weather forecastCooksville, IL
December
Weather in December
The first month of the winter, December, is also a wintry month in Cooksville, Illinois, with an average temperature ranging between min 26.1°F (-3.3°C) and max 36.5°F (2.5°C).Temperature
In Cooksville, the average high-temperature in December drops from a chilly 47.7°F (8.7°C) in November to a cold 36.5°F (2.5°C). An average low-temperature of 26.1°F (-3.3°C) is expected during December.Humidity
In Cooksville, the average relative humidity in December is 80%.Rainfall
In Cooksville, in December, it is raining for 6.3 days, with typically 0.83" (21mm) of accumulated precipitation. In Cooksville, during the entire year, the rain falls for 129.6 days and collects up to 16.73" (425mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Cooksville, Illinois. In Cooksville, in December, during 5.8 snowfall days, 1.06" (27mm) of snow is typically accumulated. Throughout the year, in Cooksville, there are 28.1 snowfall days, and 7.6" (193mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:28 pm. On the last day of December, in Cooksville, sunrise is at 7:18 am and sunset at 4:38 pm CST.
Sunshine
In Cooksville, the average sunshine in December is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cooksville. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.Note: A typical high UV index of 2 in December suggests the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cooksville, IL
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 26.1°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in December
Cooksville, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Cooksville, IL
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Cooksville, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Cooksville, IL
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is May (2.44").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in December
Cooksville, IL
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in December
Cooksville, IL
- Average snowfall in December: 1.06"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Cooksville, IL
- Average snowfall days in December: 5.8 days
The month with the highest number of snowfall days is January (9.9 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
Cooksville, IL
- Average daylight in December: 9h and 18min
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 18min).
- Average sunshine in December: 4h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Cooksville, IL
- Average sunshine days in December: 20 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Cooksville, IL
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Cooksville, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in December
Cooksville, 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).
