December weather forecastColesville, NJ
December
Weather in December
The first month of the winter, December, is also an icy month in Colesville, New Jersey, with an average temperature varying between 38.3°F (3.5°C) and 26.8°F (-2.9°C).Temperature
In Colesville, the beginning of December is marked by a lowered average high-temperature, shifting from November's chilly 48.4°F (9.1°C) to a cold 38.3°F (3.5°C). Colesville's temperature lowers to a mean of 26.8°F (-2.9°C) during the nights in December.Humidity
February, October and December, with an average relative humidity of 82%, are the most humid months.Rainfall
In December, the rain falls for 11.5 days. Throughout December, 2.99" (76mm) of precipitation is accumulated. Throughout the year, there are 165.2 rainfall days, and 31.57" (802mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Colesville, during December, snow falls for 6.6 days and regularly aggregates up to 3.27" (83mm) of snow. In Colesville, New Jersey, during the entire year, snow falls for 37.1 days and aggregates up to 19.92" (506mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:05 am and sunset at 4:30 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 4:39 pm EST.
Sunshine
In Colesville, the average sunshine in December is 4.6h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 1 in December suggests the following recommendations:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Colesville, NJ
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in December: 26.8°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in December
Colesville, NJ
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in December
Colesville, NJ
- Average wind speed in December: 6.9mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Colesville, NJ
- Average humidity in December: 82%
The months with the highest relative humidity are February, October and December (82%).
The month with the lowest relative humidity is April (76%).
Average rainfall in December
Colesville, NJ
- Average rainfall in December: 2.99"
The wettest month (with the highest rainfall) is May (3.15").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Colesville, NJ
- Average rainfall days in December: 11.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (9 days).
Average snowfall in December
Colesville, NJ
- Average snowfall in December: 3.27"
The month with the highest snowfall is February (5.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Colesville, NJ
- Average snowfall days in December: 6.6 days
The month with the highest number of snowfall days is February (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Colesville, NJ
- Average daylight in December: 9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in December
Colesville, NJ
- Average sunshine days in December: 15.8 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is April (10.7 days).
Average UV index in December
Colesville, NJ
- Average UV index in December: 1
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Colesville, NJ
- Average cloud cover in December: 51
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 36).
Average visibility in December
Colesville, NJ
- Average visibility in December: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
