December weather forecastBeltsville, MD
December
Weather in December
The first month of the winter, December, is still a chilly month in Beltsville, Maryland, with an average temperature fluctuating between 45.3°F (7.4°C) and 33.1°F (0.6°C).Temperature
During the shift to December, Beltsville records a mild decrease in average high-temperature, moving from a cool 53.2°F (11.8°C) in November to a frosty 45.3°F (7.4°C). During December nights, Beltsville records an average temperature of 33.1°F (0.6°C).Humidity
May, October and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In December, in Beltsville, the rain falls for 9.9 days. Throughout December, 2.56" (65mm) of precipitation is accumulated. In Beltsville, during the entire year, the rain falls for 155.7 days and collects up to 31.42" (798mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Beltsville, Maryland, in December, during 3.5 snowfall days, 1.38" (35mm) of snow is typically accumulated. Throughout the year, there are 17.8 snowfall days, and 9.21" (234mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Beltsville, sunrise is at 7:08 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:55 pm EST.
Sunshine
In Beltsville, the average sunshine in December is 5.1h.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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Experience reduced UV exposure by about half when donning a wide-brim hat. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Beltsville, MD
- Average high temperature in December: 45.3°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (39°F).
- Average low temperature in December: 33.1°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 (26.8°F).
Average pressure in December
Beltsville, MD
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Beltsville, MD
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in December
Beltsville, MD
- Average humidity in December: 76%
The months with the highest relative humidity are May, October and December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in December
Beltsville, MD
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is August (4.02").
The driest months (with the least rainfall) are January and February (2.01").
Average rainfall days in December
Beltsville, MD
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is November (9 days).
Average snowfall in December
Beltsville, MD
- Average snowfall in December: 1.38"
The month with the highest snowfall is March (2.95").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Beltsville, MD
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (5.4 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
Beltsville, MD
- Average daylight in December: 9h and 30min
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 30min).
- Average sunshine in December: 5h and 6min
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
Beltsville, MD
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in December
Beltsville, 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
Beltsville, MD
- Average cloud cover in December: 46
The months with the most cloud cover are March and December (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Beltsville, 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).
