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
During the transition into December, Chestnut Hill observes a decrease in the average high-temperature, falling from a cool 52.9°F (11.6°C) in November to a frosty 43.9°F (6.6°C). Nightly temperatures in Chestnut Hill, Maryland, drop to an average low of 33.1°F (0.6°C) in December.Humidity
In Chestnut Hill, the average relative humidity in December is 77%.Rainfall
In Chestnut Hill, during December, the rain falls for 7 days and regularly aggregates up to 0.75" (19mm) of precipitation. In Chestnut Hill, during the entire year, the rain falls for 102.3 days and collects up to 9.25" (235mm) of precipitation.Snowfall
Months with snowfall in Chestnut Hill are January through April, November and December. In Chestnut Hill, in December, snow falls for 2 days, with typically accumulated 0.24" (6mm) of snow. In Chestnut Hill, during the entire year, snow falls for 12.1 days and aggregates up to 1.81" (46mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:08 am and sunset at 4:44 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 4:54 pm EST.
Sunshine
In Chestnut Hill, the average sunshine in December is 5h.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 reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 2 during December translates into the following guidance:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
How cold does it get in Chestnut Hill in December?
What is the average humidity in December in Chestnut Hill?
How much does it rain in Chestnut Hill in December?
How much does it snow in Chestnut Hill in December?
What is the month with the shortest days in Chestnut Hill?
How many hours of daylight does Chestnut Hill have in December?
What time are sunrise and sunset in December in Chestnut Hill?
How long on average sun shines in December in Chestnut Hill?
What is the month with the lowest UV index in Chestnut Hill?
What is the UV index intensity in December in Chestnut Hill?
Average temperature in December
Chestnut Hill, MD
- Average high temperature in December: 43.9°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in December: 33.1°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).
Average pressure in December
Chestnut 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
Chestnut Hill, MD
- Average wind speed in December: 8.3mph
The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in December
Chestnut Hill, MD
- Average humidity in December: 77%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in December
Chestnut Hill, MD
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in December
Chestnut Hill, MD
- Average rainfall days in December: 7 days
The month with the highest number of rainy days is July (12.6 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in December
Chestnut Hill, MD
- Average snowfall in December: 0.24"
The month with the highest snowfall is January (0.55").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Chestnut Hill, MD
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is February (3.8 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
Chestnut 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 0min
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
Chestnut Hill, MD
- Average sunshine days in December: 21.9 days
The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is July (15.2 days).
Average UV index in December
Chestnut 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
Chestnut Hill, 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
Chestnut 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).
Chestnut Hill, Maryland, USA
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