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
December is characterized by a slight reduction in average high-temperature, easing from a fresh 54.9°F (12.7°C) in November to a frosty 47.5°F (8.6°C). During December, Millsboro experiences a consistent low-temperature average of 37.8°F (3.2°C).Humidity
In December, the average relative humidity in Millsboro is 76%.Rainfall
In December, in Millsboro, the rain falls for 9.7 days. Throughout December, 1.69" (43mm) of precipitation is accumulated. In Millsboro, during the entire year, the rain falls for 146.8 days and collects up to 25.2" (640mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In Millsboro, in December, during 1.9 snowfall days, 0.43" (11mm) of snow is typically accumulated. Throughout the year, in Millsboro, there are 9.4 snowfall days, and 3.39" (86mm) 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, sunrise is at 7:00 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 4:50 pm EST.
Sunshine
In Millsboro, Delaware, 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 in Millsboro. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoiding the Sun during its peak radiation time around midday is a healthy practice. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Frequently asked questions
What is the average December temperature in Millsboro?
What is the average humidity in December in Millsboro?
How much does it rain in Millsboro in December?
How much does it snow in Millsboro in December?
What is the month with the shortest days in Millsboro?
What is the average length of the day in December in Millsboro?
What time are sunrise and sunset in December in Millsboro?
How long on average sun shines in December in Millsboro?
When is the lowest UV index in Millsboro?
What is the UV index intensity in December in Millsboro?
Average temperature in December
Millsboro, DE
- Average high temperature in December: 47.5°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).
- Average low temperature in December: 37.8°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).
Average pressure in December
Millsboro, 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
Millsboro, DE
- Average wind speed in December: 10.5mph
The windiest months (with the highest average wind speed) are January, February and March (11.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in December
Millsboro, DE
- Average humidity in December: 76%
The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Millsboro, DE
- Average rainfall in December: 1.69"
The wettest months (with the highest rainfall) are July and August (2.95").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in December
Millsboro, DE
- Average rainfall days in December: 9.7 days
The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in December
Millsboro, DE
- Average snowfall in December: 0.43"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in December
Millsboro, DE
- Average snowfall days in December: 1.9 days
The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Millsboro, DE
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
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: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in December
Millsboro, DE
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.2 days).
Average UV index in December
Millsboro, 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
Millsboro, DE
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Millsboro, 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).
Millsboro, Delaware, USA
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