December weather forecastDover, NJ
December
Weather in December
December, the first month of the winter in Dover, is also a wintry month, with an average temperature ranging between max 40.1°F (4.5°C) and min 28.6°F (-1.9°C).Temperature
Transition into December marks a drop in the average high-temperature, moving from a chilly 49.3°F (9.6°C) in November to an icy 40.1°F (4.5°C). During the month of December, Dover's nighttime temperature lowers to an average of 28.6°F (-1.9°C).Humidity
The months with the highest humidity are February, October and December, with an average relative humidity of 81%.Rainfall
In Dover, in December, during 5.5 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. In Dover, during the entire year, the rain falls for 81.9 days and collects up to 6.69" (170mm) of precipitation.Snowfall
Months with snowfall in Dover are January through May, October through December. In December, in Dover, it is snowing for 2.5 days. Throughout December, 0.47" (12mm) of snow is accumulated. Throughout the year, there are 18.1 snowfall days, and 2.68" (68mm) of snow is accumulated.Daylight
The month with the shortest days in Dover is December, with an average of 9h and 18min of daylight.On the first day of December in Dover, sunrise is at 7:04 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:40 pm EST.
Sunshine
The average sunshine in December in Dover is 4.7h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A daily maximum UV index of 2 in December translates into the following instructions:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dover, NJ
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in December
Dover, 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
Dover, NJ
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Dover, NJ
- Average humidity in December: 81%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in December
Dover, NJ
- Average rainfall in December: 0.71"
The wettest month (with the highest rainfall) is July (0.79").
The driest month (with the least rainfall) is September (0.16").
Average rainfall days in December
Dover, NJ
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is July (9.5 days).
The month with the least rainy days is February (4 days).
Average snowfall in December
Dover, NJ
- Average snowfall in December: 0.47"
The month with the highest snowfall is March (0.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dover, NJ
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dover, 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 42min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Dover, NJ
- Average sunshine days in December: 24.1 days
The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (18.3 days).
Average UV index in December
Dover, NJ
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Dover, NJ
- Average cloud cover in December: 50
The months with the most cloud cover are February and March (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in December
Dover, NJ
- Average visibility in December: 6mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
