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December Weather in Brinnon, United States

Last updated: June 24, 2025

In December, the average temperature in Brinnon, United States hovers around 3°C (37°F), with temperatures dipping as low as -10°C (15°F) and rising to a maximum of 11°C (53°F). Expect wet conditions, with an average precipitation of 207 mm (8.1 in) spread over 21 days. The air will feel quite heavy, with average humidity at an impressive 87%.

December Temperature in Brinnon

In December in Brinnon, the average temperature is 3°C (37°F). Maximums can reach 11°C (53°F), while minimums can drop as low as -10°C (15°F). Be prepared for chilly weather and pack accordingly if you plan to travel during this time.

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

The chart illustrates December temperature patterns in Brinnon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brinnon, December typically has an average temperature of 3°C (37°F), with highs reaching up to 11°C (53°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec373539445257626458484237
Data source: Temperature data for Brinnon 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 Brinnon

In Brinnon in December, the precipitation amount is 207 mm (8.1 in) over the course of 21 days.

December Precipitation Trends in Brinnon

The chart displays monthly precipitation patterns in Brinnon, 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 Brinnon, December typically receives around 207 mm (8.1 inches) of precipitation spread over approximately 21 days.
JanFebMarAprMayJunJulAugSepOctNovDec203153132119941054540114155206207
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Brinnon

In Brinnon in December, humidity is 87%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating proper layers to stay warm while navigating the wet conditions.

December Average Humidity in Brinnon

This chart illustrates the average monthly humidity levels in Brinnon, 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 Brinnon is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%85%83%84%84%82%73%74%83%86%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Brinnon

In Brinnon in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Brinnon, you can visit Hourly UV Index in Brinnon.

Maximum UV Index Levels in Brinnon for December

The chart shows the monthly maximum UV Index (UVI) for Brinnon 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 Brinnon typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235699987532
Data source: Brinnon 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 Brinnon Compares to Other Months

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

This table compares monthly weather conditions in Brinnon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)203 mm (8.0 inches)86%low
February Weather2°C (36°F)153 mm (6.0 inches)84%moderate
March Weather4°C (39°F)132 mm (5.2 inches)85%moderate
April Weather7°C (44°F)118 mm (4.7 inches)83%high
May Weather11°C (52°F)94 mm (3.7 inches)84%very high
June Weather14°C (57°F)105 mm (4.1 inches)84%very high
July Weather17°C (63°F)45 mm (1.8 inches)82%very high
August Weather18°C (64°F)40 mm (1.6 inches)73%very high
September Weather14°C (58°F)114 mm (4.5 inches)74%high
October Weather9°C (48°F)155 mm (6.1 inches)83%moderate
November Weather6°C (42°F)206 mm (8.1 inches)86%moderate
December Weather3°C (37°F)207 mm (8.1 inches)87%low

Compare Brinnon's Climate with Cities Worldwide