December weather forecastCinnaminson, NJ
December
Weather in December
December, the first month of the winter in Cinnaminson, is still a chilly month, with an average temperature ranging between max 44.2°F (6.8°C) and min 32.9°F (0.5°C).Temperature
December comes with a drop in the average high-temperature, falling from November's fresh 53.2°F (11.8°C) to a frosty 44.2°F (6.8°C). Nighttime temperature experiences an average drop to a wintry 32.9°F (0.5°C) in December.Humidity
The average relative humidity in December is 76%.Rainfall
In Cinnaminson, during December, the rain falls for 7.4 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Cinnaminson, during the entire year, the rain falls for 121.5 days and collects up to 12.44" (316mm) of precipitation.Snowfall
January through May, November and December are months with snowfall in Cinnaminson. In Cinnaminson, in December, snow falls for 1.5 days, with typically accumulated 0.16" (4mm) of snow. In Cinnaminson, during the entire year, snow falls for 10.3 days and aggregates up to 2.36" (60mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:03 am and sunset at 4:35 pm. On the last day of December, in Cinnaminson, sunrise is at 7:21 am and sunset at 4:44 pm EST.
Sunshine
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 value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 2 translates into these guidelines:
Most individuals can handle sun exposure for up to an hour without burning, but children must always be shielded from sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Cinnaminson, NJ
- Average high temperature in December: 44.2°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in December
Cinnaminson, NJ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Cinnaminson, NJ
- Average wind speed in December: 7.6mph
The windiest months (with the highest average wind speed) are March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Cinnaminson, NJ
- Average humidity in December: 76%
The month with the highest relative humidity is October (77%).
The month with the lowest relative humidity is April (70%).
Average rainfall in December
Cinnaminson, NJ
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is August (1.46").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in December
Cinnaminson, NJ
- Average rainfall days in December: 7.4 days
The month with the highest number of rainy days is July (14.4 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in December
Cinnaminson, NJ
- Average snowfall in December: 0.16"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Cinnaminson, NJ
- Average snowfall days in December: 1.5 days
The month with the highest number of snowfall days is January (3.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Cinnaminson, NJ
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in December
Cinnaminson, NJ
- Average sunshine days in December: 21.5 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is July (14 days).
Average UV index in December
Cinnaminson, NJ
- 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
Cinnaminson, NJ
- Average cloud cover in December: 47
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in December
Cinnaminson, NJ
- 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).
