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 signifies a minor drop in average high-temperature, transitioning from a refreshing 63.1°F (17.3°C) in November to a fresh 54.9°F (12.7°C). In the month of December, Marietta experiences an average low-temperature of 39.9°F (4.4°C).Humidity
In Marietta, the average relative humidity in December is 78%.Rainfall
In Marietta, in December, it is raining for 10.6 days, with typically 2.6" (66mm) of accumulated precipitation. In Marietta, during the entire year, the rain falls for 145.9 days and collects up to 31.1" (790mm) of precipitation.Snowfall
January, February and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.4 snowfall days, it receives 0.28" (7mm) of snow. Throughout the year, there are 2.6 snowfall days, and 1.42" (36mm) of snow is accumulated.Daylight
With an average of 10h and 0min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:04 am and sunset at 5:10 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:21 pm CST.
Sunshine
December has the least sunshine of the year in Marietta, with an average of 5.2h of sunshine.UV index
The months with the lowest UV index in Marietta are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 3 during December translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Marietta?
What is the average humidity in December in Marietta?
How much does it rain in Marietta in December?
When does it start snowing in Marietta?
What is the month with the shortest days in Marietta?
How many hours of daylight does Marietta have in December?
When is the sunrise / sunset in December in Marietta?
What is the month with the least sunshine in Marietta?
How long on average sun shines in December in Marietta?
What are the months with the lowest UV index in Marietta?
What is the UV index intensity in December in Marietta?
Average temperature in December
Marietta, TX
- Average high temperature in December: 54.9°F
The warmest month (with the highest average high temperature) is August (94.3°F).
The month with the lowest average high temperature is January (53.1°F).
- Average low temperature in December: 39.9°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37°F).
Average pressure in December
Marietta, TX
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Marietta, TX
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Marietta, TX
- Average humidity in December: 78%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Marietta, TX
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is April (3.62").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Marietta, TX
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is August (15 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in December
Marietta, TX
- Average snowfall in December: 0.28"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Marietta, TX
- Average snowfall days in December: 0.4 days
The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Marietta, TX
- Average daylight in December: 10h and 0min
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 0min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Marietta, TX
- Average sunshine days in December: 18.3 days
The month with the most sunshine days is January (20.4 days).
The month with the least sunshine days is July (13.8 days).
Average UV index in December
Marietta, TX
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in December
Marietta, TX
- Average cloud cover in December: 44
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Marietta, TX
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Marietta, Texas, USA
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