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
Arrival of December comes with a reduction in the average high-temperature, falling from a cool 50.4°F (10.2°C) in November to a cold 39.6°F (4.2°C). West Union's average low-temperature for the month of December records at a freezing cold 28.8°F (-1.8°C).Humidity
In December, the average relative humidity in West Union, Illinois, is 80%.Rainfall
In West Union, in December, it is raining for 8.8 days, with typically 1.69" (43mm) of accumulated precipitation. Throughout the year, there are 145.2 rainfall days, and 24.76" (629mm) of precipitation is accumulated.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
With an average of 9h and 30min of daylight, December has the shortest days of the year in West Union.On the first day of the month, sunrise is at 6:51 am and sunset at 4:28 pm. On the last day of December, 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 in West Union. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
How cold does it get in West Union in December?
What is the average humidity in December in West Union?
How much does it rain in West Union in December?
What is the snowiest month in West Union?
How many days does it snow in December in West Union?
What is the month with the shortest days in West Union?
How many hours of daylight does West Union have in December?
What time are sunrise and sunset in December in West Union?
How long on average sun shines in December in West Union?
When is the lowest UV index in West Union?
How high is the UV index in December in West Union?
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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