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
With the arrival of December, Port Penn experiences a modest decline in average high-temperatures, transitioning from a fresh 53.8°F (12.1°C) in November to a frosty 45°F (7.2°C). Throughout the month of December, the average temperature in Port Penn dips to a wintry 34°F (1.1°C) at night.Humidity
The average relative humidity in December in Port Penn is 76%.Rainfall
In Port Penn, in December, it is raining for 9.8 days, with typically 2.68" (68mm) of accumulated precipitation. In Port Penn, during the entire year, the rain falls for 147.7 days and collects up to 27.8" (706mm) of precipitation.Snowfall
January through May, November and December are months with snowfall in Port Penn. In Port Penn, during December, snow falls for 2.3 days and regularly aggregates up to 0.51" (13mm) of snow. Throughout the year, in Port Penn, Delaware, there are 13.8 snowfall days, and 6.65" (169mm) of snow is accumulated.Daylight
December has the shortest days of the year in Port Penn, with an average of 9h and 24min of daylight.On the first day of December in Port Penn, sunrise is at 7:04 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:48 pm EST.
Sunshine
The average sunshine in December in Port Penn, Delaware, is 5.1h.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index in Port Penn. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 2 during December translates into the following directions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. To protect against the Sun's most potent rays, avoid direct exposure around midday. To cut down UV radiation exposure by about half, sport a wide-brim hat. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the usual temperature for Port Penn in December?
What is the average humidity in December in Port Penn?
How much does it rain in Port Penn in December?
How much does it snow in Port Penn in December?
What is the month with the shortest days in Port Penn?
What is the average length of the day in December in Port Penn?
When are sunrise and sunset in December in Port Penn?
How long on average sun shines in December in Port Penn?
What is the month with the lowest UV index in Port Penn?
What is the UV index reading in December in Port Penn?
Average temperature in December
Port Penn, DE
- Average high temperature in December: 45°F
The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in December: 34°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in December
Port Penn, 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
Port Penn, DE
- Average wind speed in December: 8.1mph
The windiest months (with the highest average wind speed) are February, March and April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in December
Port Penn, DE
- Average humidity in December: 76%
The months with the highest relative humidity are May, June, September and October (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Port Penn, DE
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (3.23").
The driest month (with the least rainfall) is January (1.77").
Average rainfall days in December
Port Penn, DE
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is November (8 days).
Average snowfall in December
Port Penn, DE
- Average snowfall in December: 0.51"
The month with the highest snowfall is March (2.32").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Port Penn, DE
- Average snowfall days in December: 2.3 days
The month with the highest number of snowfall days is January (4.2 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
Port Penn, DE
- Average daylight in December: 9h and 2min
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 24min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in December
Port Penn, DE
- Average sunshine days in December: 18.5 days
The month with the most sunshine days is November (20.6 days).
The months with the least sunshine days are May and July (11.8 days).
Average UV index in December
Port Penn, 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, February and December (UV index 2).
Average cloud cover in December
Port Penn, DE
- Average cloud cover in December: 46
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in December
Port Penn, 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).
Port Penn, Delaware, USA
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