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December Rainfall Precipitation in Washington State

Washington State is a region in the United States of America. In December precipitation ranges from low in Richland with 29 mm of snow/rainfall to heavy in Mount Rainier National Park with 532 mm of snowfall. December is a winter month in Washington State.

Where and how much does it rain in Washington State in December?

Find the average total precipitation in December for the most popular destinations in Washington State on the map below. Click on a destination dot for more detailed information.

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Legend heavy rainfall high moderate low almost none
Heavy rainfall has been defined as more than 160 mm precipitation. High: 90 mm to 160 mm. Moderate: 30 mm to 90 mm. Low: 5 mm to 30 mm.

  • How much rainfall does Washington State receive in December?
  • Seattle often experiences a notable amount of rain in December, with an average of about 143 mm. The city's weather is known to change unexpectedly because of these showers.

  • What is the wettest city in December in Washington State?
  • Based on our records, Mount Rainier National Park is the location with the highest average precipitation, receiving about 532 mm.

  • What is the driest city in December in Washington State?
  • Based on our records, Richland registers the lowest average precipitation, with only 29 mm.

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