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
Marietta's weather in December involves a mild decrease in the average high-temperature, moving down slightly from November's moderate 59.9°F (15.5°C) to a cool 52.2°F (11.2°C). An average low-temperature of 38.5°F (3.6°C) is anticipated throughout the nights during December.Humidity
March and December, with an average relative humidity of 80%, are the most humid months.Rainfall
In Marietta, in December, during 13.5 rainfall days, 3.46" (88mm) of precipitation is typically accumulated. Throughout the year, there are 165 rainfall days, and 39.29" (998mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Marietta, in December, during 0.7 snowfall days, 0.24" (6mm) of snow is typically accumulated. Throughout the year, in Marietta, there are 5.3 snowfall days, and 1.34" (34mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:42 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:00 am and sunset at 4:53 pm CST.
Sunshine
The average sunshine in December in Marietta is 4.7h.UV index
The month with the lowest UV index is December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures in Marietta?
What is the most humid month in Marietta?
What is the average humidity in December in Marietta?
How much does it rain in Marietta in December?
How many days does it snow in December in Marietta?
What is the month with the shortest days in Marietta?
What is the average length of the day in December in Marietta?
What time are sunrise and sunset in December in Marietta?
How long on average sun shines in December in Marietta?
What is the month with the lowest UV index in Marietta?
How high is the UV index in December in Marietta?
Average temperature in December
Marietta, MS
- Average high temperature in December: 52.2°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in December: 38.5°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (34°F).
Average pressure in December
Marietta, 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
Marietta, MS
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in December
Marietta, MS
- Average humidity in December: 80%
The months with the highest relative humidity are March and December (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Marietta, MS
- Average rainfall in December: 3.46"
The wettest month (with the highest rainfall) is February (4.29").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Marietta, MS
- Average rainfall days in December: 13.5 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is November (10.3 days).
Average snowfall in December
Marietta, MS
- Average snowfall in December: 0.24"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Marietta, MS
- Average snowfall days in December: 0.7 days
The month with the highest number of snowfall days is February (1.8 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
Marietta, MS
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 4h and 4min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).
Average sunshine days in December
Marietta, MS
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in December
Marietta, MS
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Marietta, MS
- Average cloud cover in December: 50
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in December
Marietta, MS
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Marietta, Mississippi, USA
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