December weather forecastOak Harbor, WA
December
Weather in December
December, the first month of the winter in Oak Harbor, is also a frosty month, with an average temperature fluctuating between 43.7°F (6.5°C) and 38.3°F (3.5°C).Temperature
December tends to be the coldest month, with temperatures averaging a daily high of 43.7°F (6.5°C) and a low of 38.3°F (3.5°C).Humidity
The average relative humidity in December is 80%.Rainfall
In Oak Harbor, during December, the rain falls for 18.7 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Oak Harbor, during the entire year, the rain falls for 183.8 days and collects up to 24.45" (621mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Oak Harbor. In Oak Harbor, during December, snow falls for 1.6 days and regularly aggregates up to 0.28" (7mm) of snow. Throughout the year, there are 9.6 snowfall days, and 5.63" (143mm) of snow is accumulated.Ocean temperature
In December, the average ocean temperature in Oak Harbor is 46.2°F (7.9°C).Note: It is advised against swimming in 46.2°F (7.9°C) when it drops below 50°F (10°C). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:41 am and sunset at 4:18 pm. On the last day of the month, 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 Oak Harbor.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Oak Harbor. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, WA
- Average daylight in December: 8h and 24min
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 36min
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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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
Oak Harbor, 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).
