December weather forecastDover, DE
December
Weather in December
By December, Dover, Delaware, fully embraces the winter season, with temperatures settling between lows of 35.6°F (2°C) and highs of 46.2°F (7.9°C). This colder period is coupled with a slight increase in snowfall at 0.51" (13mm) and days of snowfall totaling 1.7 for the month. Cloud coverage increases to 45%, the highest yearly average, contributing to greyer skies and the onset of winter. Despite shorter day lengths of 9.5 hours, the city shines with holiday decorations, creating a festive ambiance amidst the colder climate. December's wind speed, reaching 9.3mph (15km/h) on average, also contributes to the chilly winter experience in Dover.Temperature
December witnesses a gentle descent in average high-temperature, descending from November's cool 54.3°F (12.4°C) to a frosty 46.2°F (7.9°C). Dover records an average nighttime low-temperature of 35.6°F (2°C) throughout December.Humidity
In December, the average relative humidity is 76%.Rainfall
In December, the rain falls for 10.5 days. Throughout December, 2.09" (53mm) of precipitation is accumulated. In Dover, during the entire year, the rain falls for 152.3 days and collects up to 26.3" (668mm) of precipitation.Snowfall
January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 1.7 snowfall days, it receives 0.51" (13mm) of snow. In Dover, during the entire year, snow falls for 10.1 days and aggregates up to 4.61" (117mm) of snow.Daylight
The month with the shortest days in Dover, Delaware, is December, with an average of 9h and 30min of daylight.On the first day of December, sunrise is at 7:03 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 4:49 pm EST.
Sunshine
In Dover, the average sunshine in December is 5.2h.UV index
January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dover, DE
- Average high temperature in December: 46.2°F
The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in December: 35.6°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in December
Dover, DE
- Average pressure in December: 30.1"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
Dover, DE
- Average wind speed in December: 9.3mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in December
Dover, DE
- Average humidity in December: 76%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January, March, April and November (74%).
Average rainfall in December
Dover, DE
- Average rainfall in December: 2.09"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Dover, DE
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in December
Dover, DE
- Average snowfall in December: 0.51"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Dover, DE
- Average snowfall days in December: 1.7 days
The month with the highest number of snowfall days is January (3.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Dover, DE
- Average daylight in December: 9h and 30min
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 12min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in December
Dover, DE
- Average sunshine days in December: 18.4 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in December
Dover, DE
- 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 and December (UV index 2).
Average cloud cover in December
Dover, DE
- Average cloud cover in December: 45
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in December
Dover, DE
- 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).
