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
During Trenton's transition into December, the average high-temperature lessens, moving from a fresh 52.9°F (11.6°C) in November to a wintry 42.3°F (5.7°C). During December, Trenton experiences a consistent low-temperature average of 30.2°F (-1°C).Humidity
In Trenton, the average relative humidity in December is 77%.Rainfall
In Trenton, during December, the rain falls for 8.5 days and regularly aggregates up to 1.89" (48mm) of precipitation. Throughout the year, in Trenton, there are 151.1 rainfall days, and 30.43" (773mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Trenton. In Trenton, during December, snow falls for 4.5 days and regularly aggregates up to 1.46" (37mm) of snow. Throughout the year, in Trenton, Illinois, there are 22.4 snowfall days, and 6.1" (155mm) of snow is accumulated.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:58 am and sunset at 4:37 pm. On the last day of December, in Trenton, Illinois, sunrise is at 7:16 am and sunset at 4:47 pm CST.
Sunshine
In Trenton, the average sunshine in December is 4.8h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
Is December cold in Trenton?
What is the average humidity in December in Trenton?
How much does it rain in Trenton in December?
How much does it snow in Trenton in December?
What is the month with the shortest days in Trenton?
What is the average length of the day in December in Trenton?
When are sunrise and sunset in December in Trenton?
How many hours of sunshine does Trenton have in December?
What is the month with the lowest UV index in Trenton?
How high is the UV index in December in Trenton?
Average temperature in December
Trenton, IL
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 30.2°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Trenton, 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 (29.93"Hg).
Average wind speed in December
Trenton, IL
- Average wind speed in December: 8.8mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Trenton, IL
- Average humidity in December: 77%
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Trenton, IL
- Average rainfall in December: 1.89"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days in December
Trenton, IL
- Average rainfall days in December: 8.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8 days).
Average snowfall in December
Trenton, IL
- Average snowfall in December: 1.46"
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Trenton, IL
- Average snowfall days in December: 4.5 days
The month with the highest number of snowfall days is January (7.5 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
Trenton, IL
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days in December
Trenton, IL
- Average sunshine days in December: 18 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11 days).
Average UV index in December
Trenton, IL
- 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, November and December (UV index 2).
Average cloud cover in December
Trenton, IL
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Trenton, 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).
Trenton, Illinois, USA
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