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
The arrival of December corresponds with a temperature reduction, down from November's chilly 47.3°F (8.5°C) to a cold 35.6°F (2°C). December brings Wilmington a consistent average low-temperature of 25.5°F (-3.6°C).Humidity
The average relative humidity in December is 81%.Rainfall
In Wilmington, during December, the rain falls for 8.7 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, there are 160.4 rainfall days, and 33.5" (851mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, October through December. In Wilmington, during December, snow falls for 8.5 days and regularly aggregates up to 2.44" (62mm) of snow. Throughout the year, there are 38.7 snowfall days, and 15.39" (391mm) of snow is accumulated.Daylight
The month with the shortest days in Wilmington is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 6:59 am and sunset at 4:24 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:33 pm CST.
Sunshine
In December, the average sunshine is 4.3h.UV index
December is the month with the lowest UV index in Wilmington, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 1 during December, leads to the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
How cold is it in Wilmington in December?
What is the average humidity in December in Wilmington?
How much does it rain in Wilmington in December?
How many days does it snow in December in Wilmington?
What is the month with the shortest days in Wilmington?
How many hours of daylight does Wilmington have in December?
What time are sunrise and sunset in December in Wilmington?
How long on average sun shines in December in Wilmington?
When is the lowest UV index in Wilmington?
How high is the UV index in December in Wilmington?
Average temperature in December
Wilmington, IL
- Average high temperature in December: 35.6°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (29.7°F).
- Average low temperature in December: 25.5°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 (17.8°F).
Average pressure in December
Wilmington, IL
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Wilmington, IL
- Average wind speed in December: 9.3mph
The windiest months (with the highest average wind speed) are January and April (9.9mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Wilmington, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in December
Wilmington, IL
- Average rainfall in December: 1.81"
The wettest month (with the highest rainfall) is May (4.57").
The driest months (with the least rainfall) are February and November (1.69").
Average rainfall days in December
Wilmington, IL
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is May (19.2 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in December
Wilmington, IL
- Average snowfall in December: 2.44"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Wilmington, IL
- Average snowfall days in December: 8.5 days
The month with the highest number of snowfall days is January (10.6 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
Wilmington, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The months with the most sunshine are June, July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Wilmington, IL
- Average sunshine days in December: 16 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (8.6 days).
Average UV index in December
Wilmington, IL
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Wilmington, IL
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 33).
Average visibility in December
Wilmington, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are February, July and August (5mi).
Wilmington, Illinois, USA
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