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 comes with a small reduction in the average high-temperature, subtly receding from a fresh 51.1°F (10.6°C) in November to a wintry 42.3°F (5.7°C). Mount Moriah, during the nights of December, experiences an average temperature drop to a freezing cold 29.7°F (-1.3°C).Humidity
The average relative humidity in December is 78%.Rainfall
In December, the rain falls for 9.6 days. Throughout December, 1.93" (49mm) of precipitation is accumulated. In Mount Moriah, during the entire year, the rain falls for 152.2 days and collects up to 26.02" (661mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Mount Moriah, in December, during 3.8 snowfall days, 2.01" (51mm) of snow is typically accumulated. Throughout the year, there are 20.8 snowfall days, and 12.56" (319mm) of snow is accumulated.Daylight
With an average of 9h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:13 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 4:57 pm EST.
Sunshine
The average sunshine in December is 4.9h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold during December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Mount Moriah have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December in Mount Moriah?
Average temperature in December
Mount Moriah, MD
- Average high temperature in December: 42.3°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in December: 29.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).
Average pressure in December
Mount Moriah, 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
Mount Moriah, MD
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Mount Moriah, MD
- Average humidity in December: 78%
The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is July (74%).
Average rainfall in December
Mount Moriah, MD
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is September (1.61").
Average rainfall days in December
Mount Moriah, MD
- Average rainfall days in December: 9.6 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is January (8.2 days).
Average snowfall in December
Mount Moriah, MD
- Average snowfall in December: 2.01"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Mount Moriah, MD
- Average snowfall days in December: 3.8 days
The month with the highest number of snowfall days is January (6.2 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
Mount Moriah, MD
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in December
Mount Moriah, MD
- Average sunshine days in December: 18.1 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in December
Mount Moriah, 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, February, November and December (UV index 2).
Average cloud cover in December
Mount Moriah, MD
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Mount Moriah, MD
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are January, May, September and October (5mi).
Mount Moriah, Maryland, USA
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