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
December comes with a drop in the average high-temperature, falling from November's cool 54.5°F (12.5°C) to a chilly 45.1°F (7.3°C). Caseyville's average low-temperature is measured at a cold 33.3°F (0.7°C) during December.Humidity
In Caseyville, the average relative humidity in December is 78%.Rainfall
In Caseyville, during December, the rain falls for 9.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Caseyville, there are 136.4 rainfall days, and 20" (508mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Caseyville, in December, during 3.5 snowfall days, 0.28" (7mm) of snow is typically accumulated. Throughout the year, there are 15.2 snowfall days, and 3.03" (77mm) of snow is accumulated.Daylight
The month with the shortest days in Caseyville is December, with an average of 9h and 36min of daylight.On the first day of the month, sunrise is at 6:48 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:06 am and sunset at 4:44 pm CST.
Sunshine
In December, the average sunshine is 4.7h.UV index
The months with the lowest UV index in Caseyville are January, February and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 2 during December translates into the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
What is the temperature in December in Caseyville?
What is the average humidity in December in Caseyville?
How much does it rain in Caseyville in December?
How much does it snow in Caseyville in December?
What is the month with the shortest days in Caseyville?
What is the average length of the day in December in Caseyville?
What time are sunrise and sunset in December in Caseyville?
How long on average sun shines in December in Caseyville?
What are the months with the lowest UV index in Caseyville?
What is the UV index intensity in December in Caseyville?
Average temperature in December
Caseyville, KY
- Average high temperature in December: 45.1°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (40.1°F).
- Average low temperature in December: 33.3°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in December
Caseyville, KY
- 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 (29.95"Hg).
Average wind speed in December
Caseyville, KY
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is February (9.9mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Caseyville, KY
- Average humidity in December: 78%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Caseyville, KY
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is April (2.2").
The driest month (with the least rainfall) is September (0.91").
Average rainfall days in December
Caseyville, KY
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Caseyville, KY
- Average snowfall in December: 0.28"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Caseyville, KY
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (4.4 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
Caseyville, KY
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Caseyville, KY
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is October (20.7 days).
The month with the least sunshine days is July (13.1 days).
Average UV index in December
Caseyville, KY
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in December
Caseyville, KY
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Caseyville, KY
- 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).
Caseyville, Kentucky, USA
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