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
Coffeen's December weather shows a moderate shift in high-temperatures, falling from November's cool 51.4°F (10.8°C) to a wintry 40.3°F (4.6°C). December nights are marked by an average temperature drop to a subzero cold 28.9°F (-1.7°C).Humidity
In December, the average relative humidity is 78%.Rainfall
In Coffeen, in December, it is raining for 7.8 days, with typically 1.5" (38mm) of accumulated precipitation. In Coffeen, during the entire year, the rain falls for 138.5 days and collects up to 24.33" (618mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Coffeen. In Coffeen, during December, snow falls for 4.5 days and regularly aggregates up to 1.57" (40mm) of snow. Throughout the year, there are 20.6 snowfall days, and 6.3" (160mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 6:58 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:45 pm CST.
Sunshine
In December, the average sunshine is 4.8h.UV index
The months with the lowest UV index in Coffeen, Illinois, are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
How cold does it get in Coffeen in December?
What is the average humidity in December in Coffeen?
How many days does it rain in December in Coffeen?
How many days does it snow in December in Coffeen?
What is the month with the shortest days in Coffeen?
What is the average length of the day in December in Coffeen?
What time are sunrise and sunset in December in Coffeen?
How long on average sun shines in December in Coffeen?
When is the lowest UV index in Coffeen?
How high is the UV index in December in Coffeen?
Average temperature in December
Coffeen, IL
- Average high temperature in December: 40.3°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in December
Coffeen, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Coffeen, IL
- Average wind speed in December: 9.4mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in December
Coffeen, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Coffeen, IL
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is February (1.34").
Average rainfall days in December
Coffeen, IL
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (7 days).
Average snowfall in December
Coffeen, IL
- Average snowfall in December: 1.57"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Coffeen, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (6.2 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
Coffeen, IL
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in December
Coffeen, IL
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Coffeen, 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
Coffeen, IL
- Average cloud cover in December: 50
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and September (Cloud cover 29).
Average visibility in December
Coffeen, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Coffeen, Illinois, USA
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