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 sea temperature 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 its high average temperature of 43.7°F (6.5°C) and a low of 38.3°F (3.5°C), December is regarded as the coldest month.Humidity
The average relative humidity in December is 80%.Rainfall
In Coupeville, in December, it is raining for 18.7 days, with typically 2.76" (70mm) of accumulated precipitation. Throughout the year, there are 183.8 rainfall days, and 24.45" (621mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In December, it is snowing for 1.6 days. Throughout December, 0.28" (7mm) of snow is accumulated. In Coupeville, Washington, during the entire year, snow falls for 9.6 days and aggregates up to 5.63" (143mm) of snow.Ocean temperature
In Coupeville, the average seawater temperature in December is 46.2°F (7.9°C).Note: Immersing oneself in 46.2°F (7.9°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.
Daylight
December has the shortest days of the year, with an average of 8h and 24min of daylight.On the first day of the month, sunrise is at 7:41 am and sunset at 4:18 pm. On the last day of December, sunrise is at 8:01 am and sunset at 4:26 pm PST.
Sunshine
With an average of 4.6h of sunshine, December has the least sunshine of the year in Coupeville.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 estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 2 in December interprets into the following recommendations:
Unlike children, who always need sun protection, most individuals can remain in the sun for up to an hour without getting burnt. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. 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
What part of the year is the coldest?
How cold does it get in Coupeville in 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 water temperature in December?
What is the month with the shortest days?
What is the average length of the day in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Coupeville have in December?
What is the month with the lowest UV index?
What is the UV index intensity in December?
Average temperature in December
Coupeville, WA
- Average high temperature in December: 43.7°F
The warmest month (with the highest average high temperature) is July (66.2°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in December: 38.3°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is February (37.9°F).
Average pressure in December
Coupeville, WA
- Average pressure in December: 30.07"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in December
Coupeville, WA
- Average wind speed in December: 8.1mph
The windiest month (with the highest average wind speed) is November (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in December
Coupeville, WA
- Average humidity in December: 80%
The months with the highest relative humidity are January, February and March (81%).
The month with the lowest relative humidity is July (76%).
Average rainfall in December
Coupeville, WA
- Average rainfall in December: 2.76"
The wettest month (with the highest rainfall) is November (3.46").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in December
Coupeville, WA
- Average rainfall days in December: 18.7 days
The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is August (7.5 days).
Average snowfall in December
Coupeville, WA
- Average snowfall in December: 0.28"
The month with the highest snowfall is February (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Coupeville, WA
- Average snowfall days in December: 1.6 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Coupeville, WA
- Average sea temperature in December: 46.2°F
The best month for swimming (with the highest average sea temperature) is August (53°F).
The coldest month (with the lowest average sea temperature) is February (45°F).
Average daylight in December /
Average sunshine in December
Coupeville, WA
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in December
Coupeville, WA
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is August (21.7 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in December
Coupeville, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Coupeville, WA
- Average cloud cover in December: 52
The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in December
Coupeville, WA
- 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).
Coupeville, Washington, USA
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