December weather forecastCoulterville, IL
December
Weather in December
December, the first month of the winter in Coulterville, is still a chilly month, with an average temperature ranging between max 43.5°F (6.4°C) and min 31.1°F (-0.5°C).Temperature
A subtle decrease in the average high-temperature marks December, falling from November's fresh 53.6°F (12°C) to a frosty 43.5°F (6.4°C). During the month of December, the temperature in Coulterville generally drops to a low average of 31.1°F (-0.5°C).Humidity
In Coulterville, Illinois, the average relative humidity in December is 77%.Rainfall
In Coulterville, Illinois, during December, the rain falls for 6.4 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, in Coulterville, there are 125.7 rainfall days, and 18.31" (465mm) of precipitation is accumulated.Snowfall
Months with snowfall in Coulterville are January through March, October through December. In Coulterville, in December, snow falls for 2.7 days, with typically accumulated 0.63" (16mm) of snow. Throughout the year, there are 14.8 snowfall days, and 3.94" (100mm) of snow is accumulated.Daylight
The month with the shortest days in Coulterville, Illinois, is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:56 am and sunset at 4:38 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:48 pm CST.
Sunshine
In December, the average sunshine in Coulterville is 4.9h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Coulterville, Illinois. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 in December translates into these instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. To guard against the harmful effects of the Sun, minimize exposure during midday. Stay sun-safe with clothing that is both closely woven and worn loosely. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Coulterville, IL
- Average high temperature in December: 43.5°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in December
Coulterville, IL
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Coulterville, IL
- Average wind speed in December: 8.7mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in December
Coulterville, IL
- Average humidity in December: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Coulterville, IL
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in December
Coulterville, IL
- Average rainfall days in December: 6.4 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is January (6.1 days).
Average snowfall in December
Coulterville, IL
- Average snowfall in December: 0.63"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in December
Coulterville, IL
- Average snowfall days in December: 2.7 days
The month with the highest number of snowfall days is January (4.8 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
Coulterville, IL
- Average daylight in December: 9h and 36min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Coulterville, IL
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is July (13 days).
Average UV index in December
Coulterville, 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
Coulterville, IL
- Average cloud cover in December: 47
The months with the most cloud cover are January and February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in December
Coulterville, 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).
