December weather forecastDeal Island, MD
December
Weather in December
December, the first month of the winter in Deal Island, is also a frosty month, with an average temperature ranging between max 48.2°F (9°C) and min 38.1°F (3.4°C).Temperature
December sees a slight reduction in average high-temperature, with a shift from a mild 55.6°F (13.1°C) in November to a chilly 48.2°F (9°C). The average low-temperature, in December, in Deal Island, is an icy 38.1°F (3.4°C).Humidity
The average relative humidity in December is 77%.Rainfall
In Deal Island, in December, during 11 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Deal Island, during the entire year, the rain falls for 158.7 days and collects up to 30.35" (771mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Deal Island, in December, during 1.5 snowfall days, 0.51" (13mm) of snow is typically accumulated. In Deal Island, during the entire year, snow falls for 8.7 days and aggregates up to 3.74" (95mm) of snow.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 7:20 am and sunset at 4:54 pm EST.
Sunshine
With an average of 5.2h of sunshine, December has the least sunshine of the year.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 2 during December leads to these advisories:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. When the Sun is at its strongest around midday, find shade and limit exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Deal Island, MD
- Average high temperature in December: 48.2°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (42.1°F).
- Average low temperature in December: 38.1°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in December
Deal Island, 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
Deal Island, MD
- Average wind speed in December: 9.6mph
The windiest months (with the highest average wind speed) are January, February and March (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in December
Deal Island, MD
- Average humidity in December: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is January (74%).
Average rainfall in December
Deal Island, MD
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is August (3.46").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in December
Deal Island, MD
- Average rainfall days in December: 11 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in December
Deal Island, MD
- Average snowfall in December: 0.51"
The month with the highest snowfall is January (1.34").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Deal Island, MD
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Deal Island, MD
- Average daylight in December: 9h and 36min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Deal Island, MD
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is August (9.8 days).
Average UV index in December
Deal Island, 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 and December (UV index 2).
Average cloud cover in December
Deal Island, MD
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Deal Island, 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).
