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 brings a decrease in the average high-temperature, falling from November's cool 50.4°F (10.2°C) to a cold 39.6°F (4.2°C). During the nights in December, West Union experiences a consistent average temperature of 28.8°F (-1.8°C).Humidity
In West Union, the average relative humidity in December is 80%.Rainfall
In West Union, during December, the rain falls for 8.8 days and regularly aggregates up to 1.69" (43mm) of precipitation. In West Union, during the entire year, the rain falls for 145.2 days and collects up to 24.76" (629mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in West Union. December is the month with the most snowfall. Snow falls for 4.9 days and accumulates 2.13" (54mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 6:51 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 4:37 pm CST.
Sunshine
The average sunshine in December in West Union is 4.5h.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 value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the UV index of 2 transforms into the following advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to 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?
How many days does it rain in December?
When does it snow the most?
How many days 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 long on average sun shines in December?
When is the lowest UV index in West Union?
What is the UV index reading in December?
Average temperature in December
West Union, IL
- Average high temperature in December: 39.6°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 (34.5°F).
- Average low temperature in December: 28.8°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 (22.3°F).
Average pressure in December
West Union, 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
West Union, IL
- Average wind speed in December: 9.4mph
The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is July (6mph).
Average humidity in December
West Union, 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
West Union, IL
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is April (3.54").
The driest month (with the least rainfall) is February (1.26").
Average rainfall days in December
West Union, IL
- Average rainfall days in December: 8.8 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in December
West Union, IL
- Average snowfall in December: 2.13"
The month with the highest snowfall is December (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
West Union, IL
- Average snowfall days in December: 4.9 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
West Union, IL
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 4h and 3min
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 6min).
Average sunshine days in December
West Union, IL
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
West Union, 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
West Union, IL
- Average cloud cover in December: 53
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
West Union, IL
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
West Union, Illinois, USA
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