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 shift from November to December includes a minor decrease in the average high-temperature, lightly dropping from a fresh 52.3°F (11.3°C) to a frosty 43.5°F (6.4°C). During the month of December, an average temperature of 31.1°F (-0.5°C) is noted during the nights.Humidity
In December, the average relative humidity is 78%.Rainfall
In December, in Upper Seneca Crest, Maryland, the rain falls for 10.4 days. Throughout December, 2.24" (57mm) of precipitation is accumulated. Throughout the year, in Upper Seneca Crest, Maryland, there are 158.7 rainfall days, and 30.91" (785mm) of precipitation is accumulated.Snowfall
Months with snowfall in Upper Seneca Crest are January through May, October through December. In Upper Seneca Crest, in December, during 3.5 snowfall days, 2.01" (51mm) of snow is typically accumulated. Throughout the year, there are 21.3 snowfall days, and 13.31" (338mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 9h and 30min of daylight.On the first day of December in Upper Seneca Crest, sunrise is at 7:09 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:55 pm EST.
Sunshine
The average sunshine in December in Upper Seneca Crest, Maryland, 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 Upper Seneca Crest. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: The daily maximum UV index of 2 in December interprets into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
How cold does it get in Upper Seneca Crest in December?
What is the average humidity in December in Upper Seneca Crest?
How many days does it rain in December in Upper Seneca Crest?
How many days does it snow in December in Upper Seneca Crest?
What is the month with the shortest days in Upper Seneca Crest?
How many hours of daylight does Upper Seneca Crest have in December?
What time are sunrise and sunset in December in Upper Seneca Crest?
How long on average sun shines in December in Upper Seneca Crest?
What are the months with the lowest UV index in Upper Seneca Crest?
What is the UV index reading in December in Upper Seneca Crest?
Average temperature in December
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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
Upper Seneca Crest, 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).
Upper Seneca Crest, Maryland, USA
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