December weather forecastGarrett Park, MD
December
Weather in December
December, the first month of the winter in Garrett Park, is still a chilly month, with an average temperature varying between 32.9°F (0.5°C) and 45.3°F (7.4°C).Temperature
With the beginning of December, the average high-temperature shows a small decrease, transitioning from a cool 53.4°F (11.9°C) in November to a chilly 45.3°F (7.4°C). December generally records an average low-temperature of 32.9°F (0.5°C).Humidity
The months with the highest humidity are May, October and December, with an average relative humidity of 76%.Rainfall
In Garrett Park, in December, during 10.2 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, in Garrett Park, Maryland, there are 161.3 rainfall days, and 33.19" (843mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 2.9 days. Throughout December, 1.38" (35mm) of snow is accumulated. Throughout the year, there are 17.1 snowfall days, and 10.2" (259mm) 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, sunrise is at 7:08 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 4:56 pm EST.
Sunshine
With an average of 4.9h of sunshine, December has the least sunshine of the year.UV index
The months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Garrett Park, 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: 32.9°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Garrett Park, 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 (29.95"Hg).
Average wind speed in December
Garrett Park, MD
- Average wind speed in December: 7.1mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Garrett Park, 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
Garrett Park, MD
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in December
Garrett Park, MD
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (8.8 days).
Average snowfall in December
Garrett Park, MD
- Average snowfall in December: 1.38"
The months with the highest snowfall are January and March (3.03").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Garrett Park, MD
- Average snowfall days in December: 2.9 days
The months with the highest number of snowfall days are January and February (5.1 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
Garrett Park, 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: 4h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in December
Garrett Park, MD
- Average sunshine days in December: 17.5 days
The month with the most sunshine days is November (19.5 days).
The months with the least sunshine days are May and July (11 days).
Average UV index in December
Garrett Park, 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
Garrett Park, MD
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Garrett Park, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
