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
December marks a gentle change in average high-temperature, declining from November's fresh 53.4°F (11.9°C) to a chilly 45.5°F (7.5°C). December is noted for a mean low-temperature of 34.2°F (1.2°C).Humidity
In Shirley Heights, the average relative humidity in December is 76%.Rainfall
In Shirley Heights, Maryland, during December, the rain falls for 10.1 days and regularly aggregates up to 2.28" (58mm) of precipitation. In Shirley Heights, during the entire year, the rain falls for 156.6 days and collects up to 29.8" (757mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Shirley Heights. In Shirley Heights, during December, snow falls for 2.2 days and regularly aggregates up to 0.79" (20mm) of snow. In Shirley Heights, during the entire year, snow falls for 12.8 days and aggregates up to 6.77" (172mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year in Shirley Heights.On the first day of the month, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of December, in Shirley Heights, sunrise is at 7:26 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine in Shirley Heights, Maryland, is 5.2h.UV index
The months with the lowest UV index in Shirley Heights are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 2 during December translates into the following recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the usual temperature for Shirley Heights in December?
What is the average humidity in December in Shirley Heights?
How many days does it rain in December in Shirley Heights?
How many days does it snow in December in Shirley Heights?
What is the month with the shortest days in Shirley Heights?
How many hours of daylight does Shirley Heights have in December?
What time are sunrise and sunset in December in Shirley Heights?
How long on average sun shines in December in Shirley Heights?
What are the months with the lowest UV index in Shirley Heights?
What is the UV index reading in December in Shirley Heights?
Average temperature in December
Shirley Heights, MD
- Average high temperature in December: 45.5°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 (38.8°F).
- Average low temperature in December: 34.2°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in December
Shirley 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
Shirley Heights, MD
- Average wind speed in December: 8.3mph
The windiest months (with the highest average wind speed) are February and March (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in December
Shirley Heights, MD
- Average humidity in December: 76%
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are April and July (72%).
Average rainfall in December
Shirley Heights, MD
- Average rainfall in December: 2.28"
The wettest month (with the highest rainfall) is August (3.94").
The driest month (with the least rainfall) is January (1.77").
Average rainfall days in December
Shirley Heights, MD
- Average rainfall days in December: 10.1 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in December
Shirley Heights, MD
- Average snowfall in December: 0.79"
The month with the highest snowfall is January (2.24").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Shirley Heights, MD
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Shirley 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 6min).
Average sunshine days in December
Shirley Heights, MD
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (10.9 days).
Average UV index in December
Shirley 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, February, November and December (UV index 2).
Average cloud cover in December
Shirley Heights, MD
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in December
Shirley 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).
Shirley Heights, Maryland, USA
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