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
In December, the average high-temperature goes from a frosty 49.6°F (9.8°C) in November to a cold 39°F (3.9°C). Vermilion's nights in December experience an average temperature drop to a freezing cold 28.2°F (-2.1°C).Humidity
In December, the average relative humidity is 80%.Rainfall
In Vermilion, Illinois, in December, it is raining for 8.3 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Vermilion, there are 133.4 rainfall days, and 19.49" (495mm) of precipitation is accumulated.Snowfall
Months with snowfall in Vermilion are January through April, November and December. The month with the most snowfall is December, when snow falls for 4.8 days and typically aggregates up to 1.61" (41mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:52 am and sunset at 4:26 pm. On the last day of December, in Vermilion, sunrise is at 7:10 am and sunset at 4:36 pm CST.
Sunshine
The average sunshine in December is 4.4h.UV index
The months with the lowest UV index in Vermilion are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during December translates into the following guidance:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To cut down UV radiation exposure by about half, sport a wide-brim hat. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
Is December cold in Vermilion?
What is the average humidity in December in Vermilion?
How much does it rain in Vermilion in December?
What is the snowiest month in Vermilion?
How many days does it snow in December in Vermilion?
What is the month with the shortest days in Vermilion?
What is the average length of the day in December in Vermilion?
When is the sunrise / sunset in December in Vermilion?
How many hours of sunshine does Vermilion have in December?
When is the lowest UV index in Vermilion?
What is the UV index intensity in December in Vermilion?
Average temperature in December
Vermilion, IL
- Average high temperature in December: 39°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.8°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure in December
Vermilion, IL
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Vermilion, IL
- Average wind speed in December: 9.5mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).
Average humidity in December
Vermilion, IL
- Average humidity in December: 80%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Vermilion, IL
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is April (2.76").
The driest month (with the least rainfall) is February (0.94").
Average rainfall days in December
Vermilion, IL
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in December
Vermilion, IL
- Average snowfall in December: 1.61"
The month with the highest snowfall is December (1.61").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Vermilion, IL
- Average snowfall days in December: 4.8 days
The month with the highest number of snowfall days is January (6.9 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
Vermilion, IL
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in December
Vermilion, IL
- Average sunshine days in December: 19.2 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Vermilion, IL
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Vermilion, IL
- Average cloud cover in December: 54
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are June, August and September (Cloud cover 31).
Average visibility in December
Vermilion, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Vermilion, Illinois, USA
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