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 start of December signals a gentle decrease in the average high-temperature, transitioning from a fresh 55°F (12.8°C) in November to a frosty 46.2°F (7.9°C). The average low-temperature of 34°F (1.1°C) is witnessed during December.Humidity
The months with the highest humidity are May, October and December, with an average relative humidity of 76%.Rainfall
In Fort Washington, during December, the rain falls for 10.6 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Fort Washington, Maryland, during the entire year, the rain falls for 158.2 days and collects up to 30.67" (779mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Fort Washington, Maryland. In December, it is snowing for 2.5 days. Throughout December, 1.02" (26mm) of snow is accumulated. Throughout the year, in Fort Washington, there are 14.4 snowfall days, and 7.56" (192mm) 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 the month, sunrise is at 7:07 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:25 am and sunset at 4:56 pm EST.
Sunshine
In Fort Washington, the average sunshine in December is 5.2h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. 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: During December, 2 as the daily maximum UV index converts into the following advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. To protect against the Sun's most potent rays, avoid direct exposure around midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Frequently asked questions
What are December temperatures in Fort Washington?
What are the most humid months in Fort Washington?
What is the average humidity in December in Fort Washington?
How many days does it rain in December in Fort Washington?
How much does it snow in Fort Washington in December?
What is the month with the shortest days in Fort Washington?
What is the average length of the day in December in Fort Washington?
When is the sunrise / sunset in December in Fort Washington?
How many hours of sunshine does Fort Washington have in December?
What is the month with the lowest UV index in Fort Washington?
What is the UV index reading in December in Fort Washington?
Average temperature in December
Fort Washington, MD
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in December
Fort Washington, 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
Fort Washington, MD
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in December
Fort Washington, MD
- Average humidity in December: 76%
The months with the highest relative humidity are May, October and December (76%).
The months with the lowest relative humidity are April and July (71%).
Average rainfall in December
Fort Washington, MD
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in December
Fort Washington, MD
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Fort Washington, MD
- Average snowfall in December: 1.02"
The month with the highest snowfall is January (2.48").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Fort Washington, MD
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is January (4.5 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
Fort Washington, MD
- Average daylight in December: 9h and 3min
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 30min).
- 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 6min).
Average sunshine days in December
Fort Washington, MD
- Average sunshine days in December: 17.4 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in December
Fort Washington, 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
Fort Washington, MD
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Fort Washington, 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).
Fort Washington, Maryland, USA
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