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 ushers in a slight temperature change, with average high-temperatures reducing from November's cool 53.6°F (12°C) to a chilly 43.5°F (6.4°C). In December, the temperature drops to an average of 31.1°F (-0.5°C) at night.Humidity
The average relative humidity in December in Vergennes, Illinois, is 77%.Rainfall
In Vergennes, Illinois, during December, the rain falls for 8.2 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, in Vergennes, Illinois, there are 147.6 rainfall days, and 29.17" (741mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Vergennes, in December, during 3.7 snowfall days, 0.87" (22mm) of snow is typically accumulated. Throughout the year, there are 18 snowfall days, and 4.53" (115mm) of snow is accumulated.Daylight
With an average of 9h and 36min of daylight, December has the shortest days of the year in Vergennes.On the first day of December, sunrise is at 6:54 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 4:48 pm CST.
Sunshine
In December, the average sunshine 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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: In December, the average maximum UV index of 2 translates into the following recommendations:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Stay sun-safe with clothing that is both closely woven and worn loosely. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
How cold is December in Vergennes?
What is the average humidity in December in Vergennes?
How much does it rain in Vergennes in December?
How many days does it snow in December in Vergennes?
What is the month with the shortest days in Vergennes?
How many hours of daylight does Vergennes have in December?
What time are sunrise and sunset in December in Vergennes?
How many hours of sunshine does Vergennes have in December?
When is the lowest UV index in Vergennes?
How high is the UV index in December in Vergennes?
Average temperature in December
Vergennes, 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 (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in December
Vergennes, 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
Vergennes, IL
- Average wind speed in December: 8.9mph
The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Vergennes, 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
Vergennes, IL
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is April (3.58").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in December
Vergennes, IL
- Average rainfall days in December: 8.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is December (8.2 days).
Average snowfall in December
Vergennes, IL
- Average snowfall in December: 0.87"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Vergennes, IL
- Average snowfall days in December: 3.7 days
The month with the highest number of snowfall days is January (5.4 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
Vergennes, IL
- Average daylight in December: 9h and 4min
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 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Vergennes, IL
- Average sunshine days in December: 19.2 days
The months with the most sunshine days are October and November (19.5 days).
The month with the least sunshine days is May (11.4 days).
Average UV index in December
Vergennes, 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
Vergennes, IL
- Average cloud cover in December: 49
The months with the most cloud cover are January and February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in December
Vergennes, 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).
Vergennes, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
