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 is characterized by a slight reduction in average high-temperature, easing from a mild 55.6°F (13.1°C) in November to a chilly 48.2°F (9°C). In Mariners, the December nights are characterized by an average low-temperature of 39.9°F (4.4°C), a minor dip from daytime readings.Humidity
In December, the average relative humidity is 76%.Rainfall
In December, the rain falls for 10.6 days. Throughout December, 2.4" (61mm) of precipitation is accumulated. In Mariners, during the entire year, the rain falls for 158.7 days and collects up to 32.72" (831mm) of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.9 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, in Mariners, there are 5.6 snowfall days, and 2.4" (61mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 36min of daylight.On the first day of December, sunrise is at 7:01 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:54 pm EST.
Sunshine
In December, the average sunshine in Mariners is 5.2h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health hazard 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 sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are December temperatures?
What is the average humidity in December in Mariners?
How many days does it rain in December?
When does it start snowing in Mariners?
What is the month with the shortest days?
How many hours of daylight does Mariners have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Mariners have in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Mariners, MD
- Average high temperature in December: 48.2°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (42.4°F).
- Average low temperature in December: 39.9°F
The month with the highest average low temperature is July (74.7°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).
Average pressure in December
Mariners, MD
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Mariners, MD
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in December
Mariners, MD
- Average humidity in December: 76%
The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Mariners, MD
- Average rainfall in December: 2.4"
The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in December
Mariners, MD
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in December
Mariners, MD
- Average snowfall in December: 0.24"
The month with the highest snowfall is January (0.79").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Mariners, MD
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is January (1.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Mariners, MD
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in December
Mariners, MD
- Average sunshine days in December: 17.8 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is August (11.2 days).
Average UV index in December
Mariners, MD
- Average UV index in December: 2
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in December
Mariners, MD
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in December
Mariners, MD
- 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).
Mariners, Maryland, USA
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