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
The month of December, characterized by an average high of 41.9°F (5.5°C) and a low of 36°F (2.2°C), is recognized as the coldest.Humidity
In Birch Bay, the average relative humidity in December is 82%.Rainfall
In Birch Bay, in December, it is raining for 18.2 days, with typically 6.34" (161mm) of accumulated precipitation. In Birch Bay, during the entire year, the rain falls for 176.1 days and collects up to 43.78" (1112mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Birch Bay, in December, during 2 snowfall days, 1.54" (39mm) of snow is typically accumulated. In Birch Bay, during the entire year, snow falls for 10.5 days and aggregates up to 6.77" (172mm) of snow.Ocean temperature
In December, the average ocean temperature is 46°F (7.8°C).Note: Swimming in 46°F (7.8°C) can be lethal. Merely spending a few minutes in 55.4°F (13°C) waters feels harsh, and venturing below 50°F (10°C) might disrupt breathing control and bring about cold shock, contingent on individual resilience.
Daylight
With an average of 8h and 18min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:44 am and sunset at 4:16 pm. On the last day of the month, sunrise is at 8:04 am and sunset at 4:24 pm PST.
Sunshine
January and December, with an average of 3.9h of sunshine, are months with the least sunshine.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 reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: An average UV index of 2 in December transforms into this advice:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest in Birch Bay?
How cold does it get in December?
What is the average humidity in December?
How much does it rain in Birch Bay in December?
How much does it snow in December?
What is the water temperature in December?
What is the month with the shortest days?
How many hours of daylight does Birch Bay have in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Birch Bay have in December?
What is the month with the lowest UV index?
How high is the UV index in December?
Average temperature in December
Birch Bay, WA
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is August (70°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in December: 36°F
The month with the highest average low temperature is August (54.9°F).
The coldest month (with the lowest average low temperature) is February (35.8°F).
Average pressure in December
Birch Bay, WA
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in December
Birch Bay, WA
- Average wind speed in December: 6.3mph
The windiest months (with the highest average wind speed) are November and December (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Birch Bay, WA
- Average humidity in December: 82%
The months with the highest relative humidity are January and November (83%).
The month with the lowest relative humidity is July (74%).
Average rainfall in December
Birch Bay, WA
- Average rainfall in December: 6.34"
The wettest month (with the highest rainfall) is November (7.13").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in December
Birch Bay, WA
- Average rainfall days in December: 18.2 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in December
Birch Bay, WA
- Average snowfall in December: 1.54"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Birch Bay, WA
- Average snowfall days in December: 2 days
The month with the highest number of snowfall days is February (3.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Birch Bay, WA
- Average sea temperature in December: 46°F
The best months for swimming (with the highest average sea temperature) are August and September (52.6°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).
Average daylight in December /
Average sunshine in December
Birch Bay, WA
- Average daylight in December: 8h and 2min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 3h and 5min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in December
Birch Bay, WA
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is November (8.8 days).
Average UV index in December
Birch Bay, WA
- Average UV index in December: 2
The months with the highest UV index are June and 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
Birch Bay, WA
- Average cloud cover in December: 58
The months with the most cloud cover are January and December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in December
Birch Bay, 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).
Birch Bay, Washington, USA
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