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's arrival is marked by a significant decrease in the average high-temperature, moving from a wintry 41.2°F (5.1°C) in November to a subzero cold 25.2°F (-3.8°C). During the nights in December, Marietta observes an average low-temperature of 14°F (-10°C).Humidity
The average relative humidity in December is 85%.Rainfall
In Marietta, in December, it is raining for 2.8 days, with typically 1.02" (26mm) of accumulated precipitation. Throughout the year, there are 99.9 rainfall days, and 19.65" (499mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Marietta, during December, snow falls for 10.5 days and regularly aggregates up to 4.13" (105mm) of snow. Throughout the year, there are 47 snowfall days, and 20.35" (517mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 48min of daylight.On the first day of the month, sunrise is at 7:44 am and sunset at 4:45 pm. On the last day of December, sunrise is at 8:03 am and sunset at 4:54 pm CST.
Sunshine
In Marietta, the average sunshine in December is 4.2h.UV index
The average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 2 during December leads to these instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Marietta have in December?
When is the sunrise / sunset in December in Marietta?
How many hours of sunshine does Marietta have in December?
What is the UV index intensity in December?
Average temperature in December
Marietta, MN
- Average high temperature in December: 25.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (20.3°F).
- Average low temperature in December: 14°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in December
Marietta, MN
- Average pressure in December: 30.12"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in December
Marietta, MN
- Average wind speed in December: 9.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).
Average humidity in December
Marietta, MN
- Average humidity in December: 85%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (66%).
Average rainfall in December
Marietta, MN
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in December
Marietta, MN
- Average rainfall days in December: 2.8 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in December
Marietta, MN
- Average snowfall in December: 4.13"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Marietta, MN
- Average snowfall days in December: 10.5 days
The months with the highest number of snowfall days are January and December (10.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Marietta, MN
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Marietta, MN
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is June (12.6 days).
Average UV index in December
Marietta, MN
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in December
Marietta, MN
- Average cloud cover in December: 56
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Marietta, MN
- 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, Minnesota, USA
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