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 involves a small decrease in the average high-temperature, dipping slightly from a cool 53.1°F (11.7°C) in November to a frosty 44.1°F (6.7°C). During the month of December, Sylvan Hill anticipates a mean low-temperature of 32.9°F (0.5°C).Humidity
The average relative humidity in December in Sylvan Hill is 76%.Rainfall
In Sylvan Hill, in December, it is raining for 11.8 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, in Sylvan Hill, Maryland, there are 165.5 rainfall days, and 31.65" (804mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall in Sylvan Hill. In Sylvan Hill, Maryland, during December, snow falls for 2.9 days and regularly aggregates up to 1.22" (31mm) of snow. Throughout the year, there are 16.6 snowfall days, and 7.8" (198mm) of snow is accumulated.Daylight
December has the shortest days of the year in Sylvan Hill, Maryland, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of December, in Sylvan Hill, sunrise is at 7:26 am and sunset at 4:54 pm EST.
Sunshine
The average sunshine in December is 5.2h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: The daily high UV index of 2 in December translates into this advice:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
Is December cold in Sylvan Hill?
What is the average humidity in December in Sylvan Hill?
How many days does it rain in December in Sylvan Hill?
How much does it snow in Sylvan Hill in December?
What is the month with the shortest days in Sylvan Hill?
What is the average length of the day in December in Sylvan Hill?
What time are sunrise and sunset in December in Sylvan Hill?
How many hours of sunshine does Sylvan Hill have in December?
When is the lowest UV index in Sylvan Hill?
What is the UV index intensity in December in Sylvan Hill?
Average temperature in December
Sylvan Hill, MD
- Average high temperature in December: 44.1°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 (38.1°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).
Average pressure in December
Sylvan Hill, 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
Sylvan Hill, MD
- Average wind speed in December: 8mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in December
Sylvan Hill, MD
- Average humidity in December: 76%
The months with the highest relative humidity are May and October (77%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
Sylvan Hill, MD
- Average rainfall in December: 2.6"
The wettest month (with the highest rainfall) is August (3.74").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in December
Sylvan Hill, MD
- Average rainfall days in December: 11.8 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9.7 days).
Average snowfall in December
Sylvan Hill, MD
- Average snowfall in December: 1.22"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Sylvan Hill, MD
- Average snowfall days in December: 2.9 days
The month with the highest number of snowfall days is January (4.9 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
Sylvan Hill, 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 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Sylvan Hill, MD
- Average sunshine days in December: 16.2 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in December
Sylvan Hill, 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
Sylvan Hill, MD
- Average cloud cover in December: 44
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
Sylvan Hill, 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).
Sylvan Hill, Maryland, USA
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