December weather forecast
Washington, USA

December in Washington State ushers in the full embrace of winter, complete with colder temperatures and increased precipitation in the form of both rain and snow. In the western part of the state, cities like Vancouver and Olympia see average low temperatures plummet to 35°F (1.7°C). On the eastern side, cities such as Kennewick and Spokane experience nighttime lows ranging from 20°F (-6.7°C) to 25°F (-3.9°C).

Western Washington usually receives substantial rainfall, accumulating to approximately 5" (127mm) to 6" (152mm) (127 to 5.98" (152mm)). In contrast, eastern areas might see less than 2" (51mm) but are more prone to snowfall. Winds remain relatively steady, hovering between 5 to 15mph (24.1km/h) (8.05 to 15mph (24.1km/h)), although sporadic winter storms can cause gusts to spike.

December differs markedly from November by bringing a more significant risk of snowfall, especially in mountainous regions and eastern Washington. It marks the true onset of the winter season and the launch of winter sports like skiing and snowboarding in resorts across the state. January will continue the wintry trend with even colder temperatures, more frequent snow, and longer-lasting cloud cover. The shift into the new year solidifies the presence of winter, making December merely an opening act for the colder and snowier conditions to follow.

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• Seattle - December »
  The month with the most rainfall in Seattle is December, when the rain falls for 8.9 days and typically aggregates up to 0.87" (22mm) of precipitation. The month with the shortest days in Seattle is December, with an average of 8h and 30min of daylight.
• Spokane - December »
  The month with the shortest days in Spokane is December, with an average of 8h and 30min of daylight. In Spokane, December is the month with the lowest recorded average temperatures, measuring a high of 32.2°F (0.1°C) and a low of 22.1°F (-5.5°C).
• Tacoma - December »
  The month with the most rainfall in Tacoma is December, when the rain falls for 18.4 days and typically aggregates up to 4.69" (119mm) of precipitation. December is the coldest month of the year in Tacoma, registering average temperatures as high as 43.7°F (6.5°C) and as low as 34.3°F (1.3°C).
• Vancouver - December »
  December is the coldest month in Vancouver exhibiting average temperatures of 43.7°F (6.5°C) at the peak and 34°F (1.1°C) at the base. In Vancouver during December, snow falls for 0.6 days and regularly aggregates up to 0.35" (9mm) of snow.
• Bellevue - December »
  In Bellevue in December, snow falls for 1.1 days, with typically accumulated 0.31" (8mm) of snow. In Bellevue, in December, during 12.5 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.
• Kent - December »
  In Kent in December, during 1.1 snowfall days, 0.39" (10mm) of snow is typically accumulated. December has the shortest days of the year in Kent with an average of 8h and 30min of daylight.
• Everett - December »
  January and December, with an average of 4.2h of sunshine, are months with the least sunshine in Everett, Washington. January and December, with an average of 4.2h of sunshine, are months with the least sunshine in Everett, Washington.
• Renton - December »
  The month with the most rainfall in Renton is December, when the rain falls for 11.2 days and typically aggregates up to 1.34" (34mm) of precipitation. In Renton the month of December is known for its lowest average temperatures, reaching a high of 43.3°F (6.3°C) and a low of 34.2°F (1.2°C).
• Federal Way - December »
  The month with the shortest days in Federal Way is December, with an average of 8h and 30min of daylight. December, with its high-temperature average of 42.6°F (5.9°C) and a low-temperature average of 34.2°F (1.2°C), is the coldest month in Federal Way, Washington.
• Yakima - December »
  In Yakima in December, during 5.4 snowfall days, 2.76" (70mm) of snow is typically accumulated. The month with the shortest days in Yakima is December, with an average of 8h and 36min of daylight.
• Kirkland - December »
  The month with the most rainfall in Kirkland is December, when the rain falls for 18.6 days and typically aggregates up to 4.21" (107mm) of precipitation. In Kirkland during December, the rain falls for 18.6 days and regularly aggregates up to 4.21" (107mm) of precipitation.
• Bellingham - December »
  Closing the annual cycle, December in Bellingham returns to the cold temperatures, shortened daylight, and significant precipitation that define the Washington winter. With an average of 8h and 18min of daylight, December has the shortest days of the year in Bellingham, Washington.