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 shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a cool 54.1°F (12.3°C) to a chilly 45.5°F (7.5°C). Nightly temperatures in Fairmount Heights drop to an average low of 34.3°F (1.3°C) in December.Humidity
May, October and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In Fairmount Heights, in December, during 9.8 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Fairmount Heights, during the entire year, the rain falls for 157.9 days and collects up to 31.14" (791mm) of precipitation.Snowfall
January through April and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 2.4 snowfall days, it receives 0.67" (17mm) of snow. Throughout the year, there are 13.5 snowfall days, and 7.2" (183mm) 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 7:07 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:55 pm EST.
Sunshine
In December, the average sunshine is 5.1h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Fairmount Heights in December?
What is the most humid month?
What is the average humidity in December?
How many days does it rain in December?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Fairmount Heights have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
What is the month with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Fairmount Heights, MD
- Average high temperature in December: 45.5°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in December: 34.3°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in December
Fairmount Heights, 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
Fairmount Heights, 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 (5.3mph).
Average humidity in December
Fairmount Heights, 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
Fairmount Heights, MD
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in December
Fairmount Heights, MD
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is November (9 days).
Average snowfall in December
Fairmount Heights, MD
- Average snowfall in December: 0.67"
The month with the highest snowfall is January (2.6").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in December
Fairmount Heights, MD
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is January (4.1 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
Fairmount Heights, 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 0min).
Average sunshine days in December
Fairmount Heights, MD
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Fairmount Heights, 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
Fairmount Heights, 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 29).
Average visibility in December
Fairmount Heights, 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).
Fairmount Heights, Maryland, USA
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