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 arrival of December correlates with a minor temperature reduction, down from November's refreshing 63.5°F (17.5°C) to a moderate 56.3°F (13.5°C). Throughout December, the nighttime temperature in Union, Mississippi, averages to an icy 41.4°F (5.2°C).Humidity
December is the most humid month, with an average relative humidity of 81%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.5 days and typically aggregates up to 3.54" (90mm) of precipitation.Snowfall
Months with snowfall in Union are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.5 snowfall days, it receives 0.28" (7mm) of snow. In Union, during the entire year, snow falls for 3.1 days and aggregates up to 1.14" (29mm) of snow.Daylight
With an average of 10h and 6min of daylight, December has the shortest days of the year in Union, Mississippi.On the first day of December, sunrise is at 6:40 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 5:01 pm CST.
Sunshine
February and December, with an average of 4.8h of sunshine, are months with the least sunshine.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index in Union. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 3 in December translates into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Union?
What is the most humid month in Union?
What is the average humidity in December in Union?
What is the wettest month in Union?
How many days does it rain in December in Union?
When does it start to snow in Union?
What is the month with the shortest days in Union?
How many hours of daylight does Union have in December?
When are sunrise and sunset in December in Union?
What are the months with the least sunshine in Union?
How many hours of sunshine does Union have in December?
When is the lowest UV index in Union?
What is the UV index intensity in December in Union?
Average temperature in December
Union, MS
- Average high temperature in December: 56.3°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in December: 41.4°F
The months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (37°F).
Average pressure in December
Union, MS
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Union, MS
- Average wind speed in December: 7.5mph
The windiest month (with the highest average wind speed) is February (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in December
Union, MS
- Average humidity in December: 81%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Union, MS
- Average rainfall in December: 3.54"
The wettest month (with the highest rainfall) is December (3.54").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in December
Union, MS
- Average rainfall days in December: 12.5 days
The month with the highest number of rainy days is July (20.6 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in December
Union, MS
- Average snowfall in December: 0.28"
The month with the highest snowfall is January (0.51").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Union, MS
- Average snowfall days in December: 0.5 days
The month with the highest number of snowfall days is January (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Union, MS
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Union, MS
- Average sunshine days in December: 16.3 days
The month with the most sunshine days is October (20.8 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in December
Union, MS
- Average UV index in December: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in December
Union, MS
- Average cloud cover in December: 48
The months with the most cloud cover are February and December (Cloud cover 48).
The months with the least cloud cover are September and October (Cloud cover 30).
Average visibility in December
Union, MS
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (6mi).
The months with the lowest visibility are May and July (5mi).
Union, Mississippi, USA
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