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
Decatur in December undergoes a slight reduction in the average high-temperature, shifting from November's refreshing 64.4°F (18°C) to a moderate 57.2°F (14°C). Throughout December, a steady low-temperature average of 41.9°F (5.5°C) is noted.Humidity
The most humid month is December, with an average relative humidity of 81%.Rainfall
December is the month with the most rainfall. Rain falls for 13.3 days and accumulates 3.7" (94mm) of precipitation.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.31" (8mm) of snow. Throughout the year, in Decatur, there are 1.8 snowfall days, and 1.02" (26mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 6min of daylight.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 6:57 am and sunset at 5:01 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 4.9h of sunshine.UV index
January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The UV index of 3 during December translates into the following guidance:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Decatur in December?
What is the most humid month in Decatur?
What is the average humidity in December?
What is the rainiest month?
How many days does it rain in December?
When does it start snowing?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Decatur have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Decatur, MS
- Average high temperature in December: 57.2°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 (54.5°F).
- Average low temperature in December: 41.9°F
The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (37.8°F).
Average pressure in December
Decatur, 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
Decatur, MS
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is February (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
Decatur, 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
Decatur, MS
- Average rainfall in December: 3.7"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is November (2.09").
Average rainfall days in December
Decatur, MS
- Average rainfall days in December: 13.3 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in December
Decatur, MS
- Average snowfall in December: 0.31"
The month with the highest snowfall is January (0.43").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Decatur, MS
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Decatur, MS
- Average daylight in December: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 12min).
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 month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Decatur, MS
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is July (9 days).
Average UV index in December
Decatur, 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
Decatur, MS
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in December
Decatur, MS
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
Decatur, Mississippi, USA
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