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December Weather in Brush Prairie, United States

Last updated: June 24, 2025

In Brush Prairie, United States, the average temperature in December hovers around 5°C (40°F), with fluctuations ranging from a chilly -7°C (20°F) to a mild 15°C (59°F). Precipitation is notable, with approximately 273 mm (10.7 in) expected over about 20 days of the month. Coupled with high average humidity at 87%, this creates a uniquely brisk yet damp atmosphere.

December Temperature in Brush Prairie

In December in Brush Prairie, the average temperature is 5°C (40°F). Maximums can reach 15°C (59°F), while minimums can be as low as -7°C (20°F). It's advisable to pack warm clothing and be prepared for chilly weather if you plan to travel during this time.

December Weather in Brush Prairie: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Brush Prairie, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Brush Prairie, December typically has an average temperature of 5°C (40°F), with highs reaching up to 15°C (59°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec403945505762676963524540
Data source: Temperature data for Brush Prairie 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 Brush Prairie

In Brush Prairie in December, the total precipitation amount is 273 mm (10.7 in) recorded over a span of 20 days.

December Precipitation Trends in Brush Prairie

The chart displays monthly precipitation patterns in Brush Prairie, 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 Brush Prairie, December typically receives around 273 mm (10.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec24626018916686751013111199260273
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Brush Prairie

In Brush Prairie in December, humidity is 87%. With an average temperature of 5°C (40°F), this humidity feels like a damp chill that wraps around you, making outdoor excursions less enjoyable and requiring extra layers to stay comfortable while exploring.

December Average Humidity in Brush Prairie

This chart illustrates the average monthly humidity levels in Brush Prairie, 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 Brush Prairie is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%85%83%83%84%82%74%71%81%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Brush Prairie

In Brush Prairie 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 Brush Prairie, you can visit Hourly UV Index in Brush Prairie.

Maximum UV Index Levels in Brush Prairie for December

The chart shows the monthly maximum UV Index (UVI) for Brush Prairie 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 Brush Prairie typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356991087532
Data source: Brush Prairie 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 Brush Prairie Compares to Other Months

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

This table compares monthly weather conditions in Brush Prairie, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)246 mm (9.7 inches)85%low
February Weather4°C (40°F)260 mm (10.2 inches)84%moderate
March Weather7°C (45°F)189 mm (7.4 inches)85%moderate
April Weather10°C (50°F)166 mm (6.5 inches)83%high
May Weather14°C (57°F)86 mm (3.4 inches)83%very high
June Weather17°C (63°F)75 mm (3.0 inches)83%very high
July Weather20°C (68°F)10 mm (0.4 inches)82%very high
August Weather20°C (69°F)13 mm (0.5 inches)74%very high
September Weather17°C (63°F)111 mm (4.4 inches)71%high
October Weather11°C (52°F)199 mm (7.8 inches)81%moderate
November Weather7°C (46°F)260 mm (10.2 inches)87%moderate
December Weather5°C (40°F)273 mm (10.7 inches)87%low

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