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
The transition into December is accompanied by a slight temperature decrease, with the average high-temperature shifting from a cool 53.6°F (12°C) in November to a frosty 45.5°F (7.5°C). The average nighttime temperature in Shannon Forest, Maryland, lowers to a cold 34.5°F (1.4°C) throughout December.Humidity
The average relative humidity in December is 76%.Rainfall
In Shannon Forest, in December, it is raining for 10.4 days, with typically 2.32" (59mm) of accumulated precipitation. In Shannon Forest, during the entire year, the rain falls for 157.2 days and collects up to 30.47" (774mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Shannon Forest, Maryland, in December, snow falls for 2.1 days, with typically accumulated 0.39" (10mm) of snow. Throughout the year, in Shannon Forest, Maryland, there are 11.9 snowfall days, and 5.75" (146mm) of snow is accumulated.Daylight
The month with the shortest days in Shannon Forest is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine in Shannon Forest is 5.2h.UV index
January, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Shannon Forest. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: An average UV index of 2 in December transforms into this advice:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the usual temperature for Shannon Forest in December?
What is the average humidity in December in Shannon Forest?
How many days does it rain in December in Shannon Forest?
How much does it snow in Shannon Forest in December?
What is the month with the shortest days in Shannon Forest?
What is the average length of the day in December in Shannon Forest?
When are sunrise and sunset in December in Shannon Forest?
How many hours of sunshine does Shannon Forest have in December?
What are the months with the lowest UV index in Shannon Forest?
What is the UV index reading in December in Shannon Forest?
Average temperature in December
Shannon Forest, MD
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in December: 34.5°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 (27.7°F).
Average pressure in December
Shannon Forest, 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
Shannon Forest, MD
- Average wind speed in December: 8.5mph
The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Shannon Forest, MD
- Average humidity in December: 76%
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are March, April and July (72%).
Average rainfall in December
Shannon Forest, MD
- Average rainfall in December: 2.32"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in December
Shannon Forest, MD
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and November (8.4 days).
Average snowfall in December
Shannon Forest, MD
- Average snowfall in December: 0.39"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Shannon Forest, MD
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is January (3.8 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
Shannon Forest, MD
- Average daylight in December: 9h and 3min
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 1min
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 6min).
Average sunshine days in December
Shannon Forest, MD
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (19.9 days).
The months with the least sunshine days are May and July (10.8 days).
Average UV index in December
Shannon Forest, 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
Shannon Forest, MD
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Shannon Forest, 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).
Shannon Forest, Maryland, USA
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