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
In Cedar Grove Knolls, entering December brings a subtle temperature decrement, reducing from November's fresh 52.3°F (11.3°C) to a frosty 43.5°F (6.4°C). The mean low-temperature during December nights is a subzero cold 31.1°F (-0.5°C).Humidity
In December, the average relative humidity in Cedar Grove Knolls is 78%.Rainfall
In Cedar Grove Knolls, during December, the rain falls for 10.4 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Cedar Grove Knolls, during the entire year, the rain falls for 158.7 days and collects up to 30.91" (785mm) of precipitation.Snowfall
Months with snowfall in Cedar Grove Knolls are January through May, October through December. In December, it is snowing for 3.5 days. Throughout December, 2.01" (51mm) of snow is accumulated. In Cedar Grove Knolls, Maryland, during the entire year, snow falls for 21.3 days and aggregates up to 13.31" (338mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:10 am and sunset at 4:46 pm. On the last day of December, in Cedar Grove Knolls, sunrise is at 7:28 am and sunset at 4:56 pm EST.
Sunshine
In December, the average sunshine is 5.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cedar Grove Knolls. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 suggests these recommendations:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Frequently asked questions
How cold is it in Cedar Grove Knolls in December?
What is the average humidity in December in Cedar Grove Knolls?
How much does it rain in Cedar Grove Knolls in December?
How much does it snow in Cedar Grove Knolls in December?
What is the month with the shortest days in Cedar Grove Knolls?
How many hours of daylight does Cedar Grove Knolls have in December?
What time are sunrise and sunset in December in Cedar Grove Knolls?
How many hours of sunshine does Cedar Grove Knolls have in December?
What is the month with the lowest UV index in Cedar Grove Knolls?
How high is the UV index in December in Cedar Grove Knolls?
Average temperature in December
Cedar Grove Knolls, MD
- Average high temperature in December: 43.5°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 (37.8°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in December
Cedar Grove Knolls, 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
Cedar Grove Knolls, MD
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Cedar Grove Knolls, MD
- Average humidity in December: 78%
The months with the highest relative humidity are May and October (79%).
The months with the lowest relative humidity are April and July (74%).
Average rainfall in December
Cedar Grove Knolls, MD
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is August (3.82").
The driest month (with the least rainfall) is January (1.93").
Average rainfall days in December
Cedar Grove Knolls, MD
- Average rainfall days in December: 10.4 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in December
Cedar Grove Knolls, MD
- Average snowfall in December: 2.01"
The month with the highest snowfall is March (4.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Cedar Grove Knolls, MD
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Cedar Grove Knolls, 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: 4h and 54min).
Average sunshine days in December
Cedar Grove Knolls, MD
- Average sunshine days in December: 17.6 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in December
Cedar Grove Knolls, 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
Cedar Grove Knolls, MD
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in December
Cedar Grove Knolls, 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).
Cedar Grove Knolls, Maryland, USA
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