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
December, on average, is the coldest month, registering a high temperature of 41.9°F (5.5°C) and a low of 36°F (2.2°C).Humidity
In December, the average relative humidity in Birch Bay is 82%.Rainfall
In December, in Birch Bay, the rain falls for 18.2 days. Throughout December, 6.34" (161mm) of precipitation is accumulated. In Birch Bay, during the entire year, the rain falls for 176.1 days and collects up to 43.78" (1112mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Birch Bay, Washington, in December, snow falls for 2 days, with typically accumulated 1.54" (39mm) of snow. 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 Birch Bay, in December, the average water temperature is 46°F (7.8°C).Note: While a brief time in 46°F (7.8°C) at 55.4°F (13°C) is already bracing, plunging below 50°F (10°C) can severely affect breathing and introduce a cold shock, relying on your physical state.
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
The months with the lowest UV index in Birch Bay are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, a regular UV index of 2 translates into these guidelines:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Always opt for UVA and UVB-resistant sunglasses on radiant days. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the coldest months in Birch Bay?
How cold is it in Birch Bay in December?
What is the average humidity in December in Birch Bay?
How many days does it rain in December in Birch Bay?
How many days does it snow in December in Birch Bay?
What is the ocean temperature in December in Birch Bay?
What is the month with the shortest days in Birch Bay?
What is the average length of the day in December in Birch Bay?
What time are sunrise and sunset in December in Birch Bay?
What are the months with the least sunshine in Birch Bay?
How long on average sun shines in December in Birch Bay?
What is the month with the lowest UV index in Birch Bay?
What is the UV index reading in December in Birch Bay?
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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