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December Weather in Oceana, United States

Last updated: June 24, 2025

In December, the average temperature in Oceana, United States hovers around 4°C (40°F). Visitors can expect a range from a chilly -15°C (6°F) to a pleasantly mild 19°C (67°F). During this month, precipitation averages 122 mm (4.8 in) over about 12 days, contributing to a high average humidity of 86%. Make sure to pack accordingly!

December Temperature in Oceana

In December in Oceana, the average temperature is 4°C (40°F), with maximums reaching 19°C (67°F) and minimums dipping as low as -15°C (6°F). Be prepared for a wide range of temperatures when traveling to Oceana during this time.

December Weather in Oceana: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Oceana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Oceana, December typically has an average temperature of 4°C (40°F), with highs reaching up to 19°C (67°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec354045546369737168584439
Data source: Temperature data for Oceana generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Oceana

In Oceana in December, the precipitation amount is 122 mm (4.8 in) over a span of 12 days.

December Precipitation Trends in Oceana

The chart displays monthly precipitation patterns in Oceana, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Oceana, December typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1001691291381621421121049912981122
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Oceana

In Oceana in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Oceana

This chart illustrates the average monthly humidity levels in Oceana, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Oceana is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Oceana

In Oceana in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Oceana, you can check the information here.

Maximum UV Index Levels in Oceana for December

The chart shows the monthly maximum UV Index (UVI) for Oceana in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Oceana typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Oceana December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Oceana Compares to Other Months

Weather in Oceana varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Oceana, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Oceana, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (35°F)100 mm (3.9 inches)87%moderate
February Weather5°C (41°F)169 mm (6.7 inches)87%high
March Weather7°C (46°F)129 mm (5.1 inches)86%very high
April Weather12°C (54°F)138 mm (5.4 inches)84%very high
May Weather17°C (63°F)162 mm (6.4 inches)83%extreme
June Weather21°C (69°F)142 mm (5.6 inches)83%extreme
July Weather23°C (74°F)112 mm (4.4 inches)79%extreme
August Weather22°C (72°F)104 mm (4.1 inches)66%very high
September Weather20°C (68°F)99 mm (3.9 inches)68%very high
October Weather14°C (58°F)129 mm (5.1 inches)78%high
November Weather7°C (44°F)81 mm (3.2 inches)89%moderate
December Weather4°C (40°F)122 mm (4.8 inches)86%moderate

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