Peak Activity Period November usually stands out as the single wettest month, frequently exceeding 20 inches of rain. Comparison to Other Regions When compared to national averages, Ketchikan's rainfall is exceptionally high.
Ketchikan Alaska Rainfall Trends Over the Past Decade
The city receives substantial precipitation throughout the year, supporting the dense vegetation that surrounds the Tongass National Forest. Many cities in the contiguous United States receive less than 30 inches of rain per year, making the Southeast Alaskan climate nearly five times wetter.
For locals, carrying rain gear is not a seasonal choice but a year-round necessity. Region Average Annual Rainfall (inches) Ketchikan, Alaska 140 - 160 Seattle, Washington 37 - 39 New York City 45 - 50 Las Vegas, Nevada 4 - 5 Impacts on Daily Life and Infrastructure The constant moisture affects infrastructure, requiring robust drainage systems and durable building materials.
Decade-Long Ketchikan Alaska Rainfall Trends and Patterns
Monthly Distribution and Wettest Months Rainfall is not evenly distributed throughout the year in Ketchikan. This comparison highlights the dominance of the marine influence on local weather patterns.
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