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 involves a decrease in temperature, down from a chilly 48.7°F (9.3°C) in November to a wintry 39.2°F (4°C). Nighttime temperature in Port Washington experiences an average drop to a freezing cold 28°F (-2.2°C) in December.Humidity
In December, the average relative humidity is 83%.Rainfall
In Port Washington, in December, it is raining for 12.7 days, with typically 2.56" (65mm) of accumulated precipitation. In Port Washington, during the entire year, the rain falls for 173.3 days and collects up to 31.02" (788mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Port Washington, in December, during 11.5 snowfall days, 3.15" (80mm) of snow is typically accumulated. In Port Washington, during the entire year, snow falls for 55.7 days and aggregates up to 18.46" (469mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of December, sunrise is at 7:30 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 5:10 pm EST.
Sunshine
In December, the average sunshine is 3.7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. When the Sun is at its strongest around midday, find shade and limit exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. 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
How cold is December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What are the months with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Port Washington, OH
- Average high temperature in December: 39.2°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in December: 28°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in December
Port Washington, OH
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Port Washington, OH
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
Port Washington, OH
- Average humidity in December: 83%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, August and November (77%).
Average rainfall in December
Port Washington, OH
- Average rainfall in December: 2.56"
The wettest month (with the highest rainfall) is April (3.07").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in December
Port Washington, OH
- Average rainfall days in December: 12.7 days
The month with the highest number of rainy days is May (19.4 days).
The month with the least rainy days is February (9.7 days).
Average snowfall in December
Port Washington, OH
- Average snowfall in December: 3.15"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Port Washington, OH
- Average snowfall days in December: 11.5 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Port Washington, OH
- Average daylight in December: 9h and 2min
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: 3h and 4min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in December
Port Washington, OH
- Average sunshine days in December: 11.3 days
The month with the most sunshine days is November (15.5 days).
The month with the least sunshine days is February (8.9 days).
Average UV index in December
Port Washington, OH
- 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, November and December (UV index 2).
Average cloud cover in December
Port Washington, OH
- Average cloud cover in December: 62
The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Port Washington, OH
- Average visibility in December: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January and February (4mi).
Port Washington, Ohio, USA
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