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
In Seaside, the lowest average temperatures are observed in December, with a high of 46.6°F (8.1°C) and a low of 40.5°F (4.7°C).Humidity
The months with the lowest humidity in Seaside are January, March through May, October and December, with an average relative humidity of 81%.Rainfall
December is the month with the most rainfall in Seaside. Rain falls for 20.7 days and accumulates 6.54" (166mm) of precipitation.Snowfall
January through March and December are months with snowfall in Seaside. December is the first month it typically snows. Throughout December, in the average 0.3 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 2.8 snowfall days, and 1.3" (33mm) of snow is accumulated.Ocean temperature
In Seaside, in December, the average water temperature is 50°F (10°C).Note: Navigating the 50°F (10°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.
Daylight
The month with the shortest days is December, with an average of 8h and 42min of daylight.On the first day of the month, sunrise is at 7:37 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:57 am and sunset at 4:40 pm PST.
Sunshine
In Seaside, the average sunshine in December is 4.2h.UV index
The months with the lowest UV index in Seaside are February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
What part of the year is the coldest in Seaside?
What is the usual temperature for Seaside in December?
What are the least humid months in Seaside?
What is the average humidity in December in Seaside?
What is the wettest month in Seaside?
How many days does it rain in December in Seaside?
When does it start to snow in Seaside?
What is the ocean temperature in December in Seaside?
What is the month with the shortest days in Seaside?
How many hours of daylight does Seaside have in December?
What time are sunrise and sunset in December in Seaside?
How long on average sun shines in December in Seaside?
What is the month with the lowest UV index in Seaside?
What is the UV index intensity in December in Seaside?
Average temperature in December
Seaside, OR
- Average high temperature in December: 46.6°F
The warmest month (with the highest average high temperature) is August (65.5°F).
The month with the lowest average high temperature is December (46.6°F).
- Average low temperature in December: 40.5°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.5°F).
Average pressure in December
Seaside, OR
- Average pressure in December: 30.06"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in December
Seaside, OR
- Average wind speed in December: 10.5mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in December
Seaside, OR
- Average humidity in December: 81%
The month with the highest relative humidity is August (84%).
The months with the lowest relative humidity are January, March, April, May, October and December (81%).
Average rainfall in December
Seaside, OR
- Average rainfall in December: 6.54"
The wettest month (with the highest rainfall) is December (6.54").
The driest months (with the least rainfall) are July and August (0.47").
Average rainfall days in December
Seaside, OR
- Average rainfall days in December: 20.7 days
The month with the highest number of rainy days is March (20.8 days).
The months with the least rainy days are July and August (7.3 days).
Average snowfall in December
Seaside, OR
- Average snowfall in December: 0.04"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Seaside, OR
- Average snowfall days in December: 0.3 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in December
Seaside, OR
- Average sea temperature in December: 49.9°F
The best month for swimming (with the highest average sea temperature) is July (57.2°F).
The coldest month (with the lowest average sea temperature) is February (48.1°F).
Average daylight in December /
Average sunshine in December
Seaside, OR
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in December: 4h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in December
Seaside, OR
- Average sunshine days in December: 8.8 days
The month with the most sunshine days is August (21.2 days).
The month with the least sunshine days is February (7.5 days).
Average UV index in December
Seaside, OR
- Average UV index in December: 2
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in December
Seaside, OR
- Average cloud cover in December: 56
The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in December
Seaside, OR
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Seaside, Oregon, USA
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