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 Preston, the beginning of December is marked by a marginally lowered average high-temperature, shifting from November's fresh 55°F (12.8°C) to a frosty 47.1°F (8.4°C). The average temperature during December nights dips to a wintry 36.1°F (2.3°C).Humidity
The average relative humidity in December in Preston is 77%.Rainfall
In December, the rain falls for 9 days. Throughout December, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 135.7 rainfall days, and 16.34" (415mm) of precipitation is accumulated.Snowfall
January through March, May, November and December are months with snowfall. In Preston, in December, snow falls for 2 days, with typically accumulated 0.71" (18mm) of snow. Throughout the year, there are 9.5 snowfall days, and 3.35" (85mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:42 pm. On the last day of December, sunrise is at 7:21 am and sunset at 4:52 pm EST.
Sunshine
In Preston, the average sunshine in December is 5.3h.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in Preston in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Preston have in December?
When is the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Preston, MD
- Average high temperature in December: 47.1°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in December: 36.1°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in December
Preston, MD
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Preston, MD
- Average wind speed in December: 8.6mph
The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in December
Preston, MD
- Average humidity in December: 77%
The months with the highest relative humidity are May, August and September (79%).
The months with the lowest relative humidity are January, March and November (74%).
Average rainfall in December
Preston, MD
- Average rainfall in December: 1.1"
The wettest months (with the highest rainfall) are July and August (2.01").
The driest months (with the least rainfall) are January and September (0.94").
Average rainfall days in December
Preston, MD
- Average rainfall days in December: 9 days
The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is November (7.2 days).
Average snowfall in December
Preston, MD
- Average snowfall in December: 0.71"
The month with the highest snowfall is January (1.02").
The months with the least snowfall are April, June, July, August, September and October (0").
Average snowfall days in December
Preston, MD
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is January (3 days).
The months with the least snowfall days are April, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Preston, MD
- Average daylight in December: 9h and 3min
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 30min).
- Average sunshine in December: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in December
Preston, MD
- Average sunshine days in December: 19.7 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (11.5 days).
Average UV index in December
Preston, MD
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, November and December (UV index 2).
Average cloud cover in December
Preston, 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 28).
Average visibility in December
Preston, 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).
Preston, Maryland, USA
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