December weather forecast
Oceanside, OR

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Weather in December

The first month of the winter, December, is also a frosty month in Oceanside, Oregon, with an average temperature ranging between max 45.5°F (7.5°C) and min 38.7°F (3.7°C).

Temperature

Oceanside witnesses the coldest weather in December, with temperatures averaging a high of 45.5°F (7.5°C) and a low of 38.7°F (3.7°C).

Humidity

In Oceanside, the average relative humidity in December is 83%.

Rainfall

December is the month with the most rainfall. Rain falls for 15.5 days and accumulates 2.68" (68mm) of precipitation.

Snowfall

January through March and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Oceanside, during the entire year, snow falls for 2.6 days and aggregates up to 0.55" (14mm) of snow.

Daylight

With an average of 8h and 48min of daylight, December has the shortest days of the year in Oceanside.
On the first day of the month, sunrise is at 7:36 am and sunset at 4:34 pm. On the last day of December, sunrise is at 7:55 am and sunset at 4:42 pm PST.

Sunshine

The average sunshine in December is 4h.

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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In December, a daily UV index of 2 turns into the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Updated: Jun 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest?

Oceanside's coldest month, December, generally records average temperatures ranging from a high of 45.5°F (7.5°C) to a low of 38.7°F (3.7°C).

What is the temperature in December?

The high-temperature, in December, in Oceanside, is 45.5°F (7.5°C), while the low-temperature averages to 38.7°F (3.7°C).

What is the average humidity in December in Oceanside?

In December, the average relative humidity in Oceanside is 83%.

What is the rainiest month?

December is the month with the most rainfall. Rain falls for 15.5 days and accumulates 2.68" (68mm) of precipitation.

How much does it rain in December?

In December, the rain falls for 15.5 days. Throughout December, 2.68" (68mm) of precipitation is accumulated.

When does it start to snow?

December is the first month it typically snows in Oceanside. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 48min of daylight.

How many hours of daylight does Oceanside have in December?

In Oceanside, the average day length in December is 8h and 47min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:36 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:42 pm PST.

How long on average sun shines in December?

In Oceanside, the average sunshine duration in December is 4h.

What are the months with the lowest UV index?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Oceanside, OR

Average temperature in December - Oceanside, OR
  • Average high temperature in December: 45.5°F

The warmest month (with the highest average high temperature) is August (68.4°F).
The month with the lowest average high temperature is December (45.5°F).

  • Average low temperature in December: 38.7°F

The month with the highest average low temperature is August (53.8°F).
The coldest month (with the lowest average low temperature) is December (38.7°F).

Average pressure in December
Oceanside, OR

Average pressure in December - Oceanside, OR
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is September (30.02"Hg).

Average wind speed in December
Oceanside, OR

Average wind speed in December - Oceanside, OR
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).

Average humidity in December
Oceanside, OR

Average humidity in December - Oceanside, OR
  • Average humidity in December: 83%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is May (80%).

Average rainfall in December
Oceanside, OR

Average rainfall in December - Oceanside, OR
  • Average rainfall in December: 2.68"

The wettest month (with the highest rainfall) is December (2.68").
The driest month (with the least rainfall) is July (0.24").

Average rainfall days in December
Oceanside, OR

Average rainfall days in December - Oceanside, OR
  • Average rainfall days in December: 15.5 days

The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is August (4.3 days).

Average snowfall in December
Oceanside, OR

Average snowfall in December - Oceanside, OR
  • Average snowfall in December: 0.04"

The month with the highest snowfall is February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in December
Oceanside, OR

Average snowfall days in December - Oceanside, OR
  • Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Oceanside, OR

Average daylight in December / Average sunshine in December - Oceanside, OR
  • Average daylight in December: 8h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in December: 4h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Oceanside, OR

Average sunshine days in December - Oceanside, OR
  • Average sunshine days in December: 13.4 days

The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is March (11.4 days).

Average UV index in December
Oceanside, OR

Average UV index in December - Oceanside, OR
  • 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
Oceanside, OR

Average cloud cover in December - Oceanside, OR
  • Average cloud cover in December: 57

The months with the most cloud cover are February and March (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in December
Oceanside, OR

Average visibility in December - Oceanside, 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).

Oceanside, Oregon, USA

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