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 onset of December comes with a shift in the average high-temperature, falling from a fresh 50.4°F (10.2°C) in November to a wintry 39.2°F (4°C). Throughout the nights in December, Jeisyville experiences an average low-temperature of 28.2°F (-2.1°C).Humidity
In December, the average relative humidity is 78%.Rainfall
The months with the least rainfall are September and December Rain falls for 5.1 days and accumulates 0.39" (10mm) of rain.Snowfall
January through March, November and December are months with snowfall. In Jeisyville, during December, snow falls for 3.9 days and regularly aggregates up to 0.47" (12mm) of snow. In Jeisyville, during the entire year, snow falls for 17.5 days and aggregates up to 1.97" (50mm) 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 6:59 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:18 am and sunset at 4:43 pm CST.
Sunshine
In Jeisyville, the average sunshine in December is 4.7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in December?
What is the average humidity in December?
What is the driest month?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
When is the sunrise / sunset in December?
How many hours of sunshine does Jeisyville have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Jeisyville, IL
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in December: 28.2°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in December
Jeisyville, 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 (29.92"Hg).
Average wind speed in December
Jeisyville, IL
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest month (with the lowest average wind speed) is July (6.1mph).
Average humidity in December
Jeisyville, IL
- Average humidity in December: 78%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Jeisyville, IL
- Average rainfall in December: 0.39"
The wettest month (with the highest rainfall) is April (0.94").
The driest months (with the least rainfall) are September and December (0.39").
Average rainfall days in December
Jeisyville, IL
- Average rainfall days in December: 5.1 days
The month with the highest number of rainy days is May (11.5 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in December
Jeisyville, IL
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Jeisyville, IL
- Average snowfall days in December: 3.9 days
The month with the highest number of snowfall days is January (5.9 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
Jeisyville, 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 4min
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 12min).
Average sunshine days in December
Jeisyville, IL
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is November (22.6 days).
The months with the least sunshine days are May and June (16.5 days).
Average UV index in December
Jeisyville, 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
Jeisyville, IL
- Average cloud cover in December: 51
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Jeisyville, 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).
Jeisyville, Illinois, USA
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