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 advent of December brings a slight shift in average high-temperature, moving from a cool 52.9°F (11.6°C) in November to a frosty 44.1°F (6.7°C). Throughout the month of December, Perryville observes an average nighttime temperature of 32.9°F (0.5°C).Humidity
In Perryville, Maryland, the average relative humidity in December is 77%.Rainfall
In December, the rain falls for 10.2 days. Throughout December, 2.95" (75mm) of precipitation is accumulated. Throughout the year, there are 153.1 rainfall days, and 31.5" (800mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Perryville, Maryland, in December, during 2.9 snowfall days, 1.14" (29mm) of snow is typically accumulated. Throughout the year, there are 17.4 snowfall days, and 8.15" (207mm) 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 the month, sunrise is at 7:06 am and sunset at 4:40 pm. On the last day of December, sunrise is at 7:24 am and sunset at 4:50 pm EST.
Sunshine
The average sunshine in December is 5.1h.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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is 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 in Perryville?
How many hours of daylight does Perryville have in December?
When is the sunrise / sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Perryville, MD
- Average high temperature in December: 44.1°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in December
Perryville, MD
- Average pressure in December: 30.1"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Perryville, MD
- Average wind speed in December: 8.2mph
The windiest months (with the highest average wind speed) are February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in December
Perryville, MD
- Average humidity in December: 77%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is April (74%).
Average rainfall in December
Perryville, MD
- Average rainfall in December: 2.95"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in December
Perryville, MD
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is November (8.7 days).
Average snowfall in December
Perryville, MD
- Average snowfall in December: 1.14"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Perryville, MD
- Average snowfall days in December: 2.9 days
The month with the highest number of snowfall days is January (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Perryville, 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: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Perryville, MD
- Average sunshine days in December: 18 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in December
Perryville, 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
Perryville, MD
- Average cloud cover in December: 45
The months with the most cloud cover are February, March and May (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Perryville, MD
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Perryville, Maryland, USA
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