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 December weather comes with a decrease in average high-temperatures, moving from a fresh 50.7°F (10.4°C) in November to a cold 40.1°F (4.5°C). Marietta, during December, witnesses an average low-temperature of 29.3°F (-1.5°C).Humidity
December is the most humid month, with an average relative humidity of 82%.Rainfall
In Marietta, Indiana, in December, it is raining for 9.5 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, there are 149.3 rainfall days, and 25.83" (656mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall in Marietta, Indiana. In December, in Marietta, it is snowing for 6.5 days. Throughout December, 1.54" (39mm) of snow is accumulated. Throughout the year, there are 28.6 snowfall days, and 8.15" (207mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year in Marietta.On the first day of the month, sunrise is at 7:45 am and sunset at 5:20 pm. On the last day of December, sunrise is at 8:03 am and sunset at 5:30 pm EST.
Sunshine
The average sunshine in December in Marietta is 4.3h.UV index
The months with the lowest UV index in Marietta are January, February, October through December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 2 in December transforms into this advice:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
Is December cold in Marietta?
What is the most humid month in Marietta?
What is the average humidity in December in Marietta?
How many days does it rain in December in Marietta?
How much does it snow in Marietta in December?
What is the month with the shortest days in Marietta?
What is the average length of the day in December in Marietta?
When 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 reading in December in Marietta?
Average temperature in December
Marietta, IN
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in December: 29.3°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in December
Marietta, IN
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Marietta, IN
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are January and February (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in December
Marietta, IN
- Average humidity in December: 82%
The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Marietta, IN
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in December
Marietta, IN
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (7.8 days).
Average snowfall in December
Marietta, IN
- Average snowfall in December: 1.54"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Marietta, IN
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (8 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, IN
- 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: 4h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in December
Marietta, IN
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in December
Marietta, IN
- 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, October, November and December (UV index 2).
Average cloud cover in December
Marietta, IN
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Marietta, IN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Marietta, Indiana, USA
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