December weather forecastCrestwood, MD
December
Weather in December
December, the first month of the winter in Crestwood, is still a chilly month, with an average temperature fluctuating between 45.5°F (7.5°C) and 34.2°F (1.2°C).Temperature
A subtle shift in Crestwood's weather is observed as November turns into December, with the average high temperature reducing from a cool 53.4°F (11.9°C) to a frosty 45.5°F (7.5°C). An average nighttime temperature of 34.2°F (1.2°C) is observed during December.Humidity
In Crestwood, the average relative humidity in December is 76%.Rainfall
In Crestwood, in December, it is raining for 10.1 days, with typically 2.28" (58mm) of accumulated precipitation. In Crestwood, during the entire year, the rain falls for 156.3 days and collects up to 29.61" (752mm) of precipitation.Snowfall
Months with snowfall are January through March, November and December. In December, it is snowing for 2.2 days. Throughout December, 0.79" (20mm) of snow is accumulated. In Crestwood, 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.On the first day of December, sunrise is at 7:07 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:53 pm EST.
Sunshine
In December, the average sunshine 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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: An average UV index of 2 in December transforms into this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, MD
- Average daylight in December: 9h and 30min
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 12min
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
Crestwood, 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
Crestwood, 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
Crestwood, 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
Crestwood, 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).
