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
Transition into December subtly marks a drop in the average high-temperature, moderately moving from a fresh 53.2°F (11.8°C) in November to a frosty 44.8°F (7.1°C). During the nights in December, the temperature averages to a wintry 33.8°F (1°C).Humidity
In Overlea, the average relative humidity in December is 76%.Rainfall
In Overlea, in December, during 7.7 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. Throughout the year, there are 127.2 rainfall days, and 12.32" (313mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March and December. December is the first month it typically snows. Throughout December, in the average 1.8 snowfall days, it receives 0.2" (5mm) of snow. In Overlea, Maryland, during the entire year, snow falls for 10.1 days and aggregates up to 1.77" (45mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:52 pm EST.
Sunshine
The average sunshine in December is 5.2h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Stay sun-safe with clothing that is both closely woven and worn loosely. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Overlea in December?
What is the average humidity in December?
How many days does it rain in December?
When does it start to snow?
What is the month with the shortest days in Overlea?
What is the average length of the day in December in Overlea?
When is the sunrise / sunset in December?
How many hours of sunshine does Overlea have in December?
When is the lowest UV index in Overlea?
How high is the UV index in December?
Average temperature in December
Overlea, MD
- Average high temperature in December: 44.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (38.5°F).
- Average low temperature in December: 33.8°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Overlea, 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 (29.94"Hg).
Average wind speed in December
Overlea, MD
- Average wind speed in December: 8.6mph
The windiest months (with the highest average wind speed) are January, February and March (9.3mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in December
Overlea, MD
- Average humidity in December: 76%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are March, April and November (73%).
Average rainfall in December
Overlea, MD
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is August (2.01").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in December
Overlea, MD
- Average rainfall days in December: 7.7 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is November (6.3 days).
Average snowfall in December
Overlea, MD
- Average snowfall in December: 0.2"
The month with the highest snowfall is January (0.75").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Overlea, MD
- Average snowfall days in December: 1.8 days
The month with the highest number of snowfall days is January (3.1 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
Overlea, MD
- 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: 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 0min).
Average sunshine days in December
Overlea, MD
- Average sunshine days in December: 20.5 days
The month with the most sunshine days is November (22.3 days).
The month with the least sunshine days is July (12.9 days).
Average UV index in December
Overlea, 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, February, November and December (UV index 2).
Average cloud cover in December
Overlea, MD
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Overlea, 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).
Overlea, Maryland, USA
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