nomadseason

December Weather in Spanaway, United States

Last updated: June 24, 2025

In December, the average temperature in Spanaway, United States hovers around 5°C (41°F), with extremes ranging from a chilly -8°C (17°F) to a milder 14°C (58°F). During this time, expect significant precipitation totaling 201 mm (7.9 in) over approximately 19 days, while humidity stays high at about 87%. Stay prepared for a blend of cold and wet conditions!

December Temperature in Spanaway

In December in Spanaway, the average temperature is 5°C (41°F). Maximums can reach 14°C (58°F) and minimums can drop as low as -8°C (17°F). Be prepared for a mix of mild and chilly weather, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in Spanaway, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spanaway, December typically has an average temperature of 5°C (41°F), with highs reaching up to 14°C (58°F) and lows dropping to around -8°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec413944495560656560504541
Data source: Temperature data for Spanaway generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Spanaway

In Spanaway in December, the total precipitation amount reaches 201 mm (7.9 in) over the course of 19 days.

December Precipitation Trends in Spanaway

The chart displays monthly precipitation patterns in Spanaway, 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 Spanaway, December typically receives around 201 mm (7.9 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec1831891361186858111390142180201
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Spanaway

In Spanaway in December humidity is 87%. With an average temperature of 5°C (41°F), this humidity feels like a heavy, damp blanket enveloping you, making every step seem laborious and the chill more biting, which can be quite challenging for traveling.

December Average Humidity in Spanaway

This chart illustrates the average monthly humidity levels in Spanaway, 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 Spanaway 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 Spanaway

In Spanaway 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 Spanaway, you can visit Hourly UV Index in Spanaway.

Maximum UV Index Levels in Spanaway for December

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

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

This table compares monthly weather conditions in Spanaway, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)183 mm (7.2 inches)86%low
February Weather4°C (40°F)189 mm (7.4 inches)84%moderate
March Weather7°C (44°F)136 mm (5.4 inches)85%moderate
April Weather9°C (49°F)118 mm (4.7 inches)83%high
May Weather13°C (55°F)68 mm (2.7 inches)84%very high
June Weather16°C (60°F)58 mm (2.3 inches)84%very high
July Weather18°C (65°F)11 mm (0.4 inches)82%very high
August Weather18°C (66°F)13 mm (0.5 inches)73%very high
September Weather16°C (60°F)90 mm (3.5 inches)74%high
October Weather10°C (51°F)142 mm (5.6 inches)83%moderate
November Weather7°C (45°F)180 mm (7.1 inches)86%moderate
December Weather5°C (41°F)201 mm (7.9 inches)87%low

Compare Spanaway's Climate with Cities Worldwide