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December Weather in McChord Air Force Base, United States

Last updated: June 24, 2025

In December, the average temperature in McChord Air Force Base, United States hovers around 6°C (43°F), with minimums dipping as low as -6°C (22°F) and maximums reaching up to 14°C (57°F). Expect 184 mm (7.2 in) of precipitation spread over 19 days, and be prepared for a high average humidity of 87%, creating a cool and often damp atmosphere.

December Temperature in McChord Air Force Base

In December in McChord Air Force Base, the average temperature is 6°C (43°F), with maximums reaching up to 14°C (57°F) and minimums dropping as low as -6°C (22°F). It's advisable to pack layers to stay comfortable while exploring the area's winter charm.

December Weather in McChord Air Force Base: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in McChord Air Force Base, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In McChord Air Force Base, December typically has an average temperature of 6°C (43°F), with highs reaching up to 14°C (57°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec434246505762676762534743
Data source: Temperature data for McChord Air Force Base 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 McChord Air Force Base

In McChord Air Force Base in December, the total precipitation amount is 184 mm (7.2 in) spread over 19 days.

December Precipitation Trends in McChord Air Force Base

The chart displays monthly precipitation patterns in McChord Air Force Base, 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 McChord Air Force Base, December typically receives around 184 mm (7.2 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec169151116102534681283123167184
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in McChord Air Force Base

In McChord Air Force Base in December, humidity is 87%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating warm, breathable layers for traveling.

December Average Humidity in McChord Air Force Base

This chart illustrates the average monthly humidity levels in McChord Air Force Base, 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 McChord Air Force Base 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 McChord Air Force Base

In McChord Air Force Base 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 McChord Air Force Base, you can visit Hourly UV Index in McChord Air Force Base.

Maximum UV Index Levels in McChord Air Force Base for December

The chart shows the monthly maximum UV Index (UVI) for McChord Air Force Base 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 McChord Air Force Base typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987532
Data source: McChord Air Force Base 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 McChord Air Force Base Compares to Other Months

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

This table compares monthly weather conditions in McChord Air Force Base, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)168 mm (6.6 inches)86%low
February Weather5°C (42°F)151 mm (6.0 inches)84%moderate
March Weather8°C (46°F)116 mm (4.6 inches)85%moderate
April Weather10°C (50°F)102 mm (4.0 inches)83%high
May Weather14°C (57°F)53 mm (2.1 inches)84%very high
June Weather17°C (62°F)46 mm (1.8 inches)84%very high
July Weather19°C (67°F)8 mm (0.3 inches)82%very high
August Weather20°C (68°F)11 mm (0.5 inches)73%very high
September Weather17°C (63°F)83 mm (3.3 inches)74%high
October Weather12°C (53°F)123 mm (4.9 inches)83%moderate
November Weather9°C (48°F)167 mm (6.6 inches)86%moderate
December Weather6°C (43°F)184 mm (7.2 inches)87%low

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