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
In Marietta, the average high-temperature in December decreases from a fresh 51.1°F (10.6°C) in November to a cold 41.7°F (5.4°C). An average low-temperature of 30.4°F (-0.9°C) is common in Marietta during the nights of December.Humidity
In Marietta, the average relative humidity in December is 82%.Rainfall
In Marietta, in December, during 11.3 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Marietta, Ohio, during the entire year, the rain falls for 156.1 days and collects up to 24.8" (630mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Marietta, in December, during 5.4 snowfall days, 1.46" (37mm) of snow is typically accumulated. In Marietta, during the entire year, snow falls for 31.3 days and aggregates up to 9.37" (238mm) of snow.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:27 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:12 pm EST.
Sunshine
The average sunshine in December in Marietta, Ohio, is 3.8h.UV index
The months with the lowest UV index in Marietta are January, February, November and 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 average person.Note: The maximum UV index of 2 during December translates into these guidelines:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
How cold is December 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 many hours of sunshine does Marietta have in December?
What is the month with the lowest UV index in Marietta?
What is the UV index intensity in December in Marietta?
Average temperature in December
Marietta, OH
- Average high temperature in December: 41.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 30.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in December
Marietta, OH
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Marietta, OH
- Average wind speed in December: 6.2mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in December
Marietta, OH
- Average humidity in December: 82%
The months with the highest relative humidity are January and February (83%).
The months with the lowest relative humidity are June, July and August (76%).
Average rainfall in December
Marietta, OH
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in December
Marietta, OH
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is November (8.4 days).
Average snowfall in December
Marietta, OH
- Average snowfall in December: 1.46"
The month with the highest snowfall is February (2.8").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Marietta, OH
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is January (9.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Marietta, OH
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Marietta, OH
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (9.8 days).
Average UV index in December
Marietta, OH
- 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
Marietta, OH
- Average cloud cover in December: 61
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Marietta, OH
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
Marietta, Ohio, USA
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