What is Seattle’s Wettest Month?
Seattle’s wettest month is typically November, with an average rainfall of around 6.3 inches. This consistent precipitation contributes significantly to Seattle’s reputation as a rainy city, although the city receives less annual rainfall than many other major US cities.
Seattle’s November Rainfall
November in Seattle is characterized by frequent and often prolonged periods of rain. The Pacific Northwest’s weather patterns bring in moisture-laden air from the ocean, resulting in consistently damp conditions. While it’s not usually heavy downpours every day, the cumulative effect of many drizzly or lightly rainy days makes November the wettest month. Temperatures during November in Seattle are relatively mild, usually hovering between the low 40s and low 50s Fahrenheit, which contributes to the prevalence of rain rather than snow.
Why November is the Wettest
Several factors contribute to November being Seattle’s wettest month. The jet stream tends to dip southwards during fall and winter, bringing more storms and precipitation into the Pacific Northwest. In addition, the Olympic Mountains create a rain shadow effect, further concentrating rainfall to the west, where Seattle is located. The combination of these factors results in a higher probability of rain during November compared to other months.
Other Rainy Months in Seattle
While November is the wettest, Seattle also experiences significant rainfall in other months. October and December are often quite rainy, with average rainfalls similar to November. The period from October through March generally sees the most precipitation, contributing to the region’s overall reputation for wet weather. Check the Climate of Seattle on Wikipedia for detailed information about Seattle’s rainfall patterns throughout the year.
Seattle Weather in General
Contrary to popular belief, Seattle’s total annual rainfall is not excessively high compared to other major cities. The misconception often arises from the frequency of rainy days. Seattle experiences a large number of days with measurable precipitation, even if the amount of rain on those days is not substantial. This pattern of frequent drizzle and light rain creates the perception of a constantly rainy environment.
FAQs About Seattle Rainfall
Is Seattle always raining?
No, despite its reputation, Seattle is not always raining. While it does have many days with some precipitation, it also experiences periods of sunshine, especially during the summer months.
What is the driest month in Seattle?
July is typically the driest month in Seattle, with the least amount of rainfall.
Does it snow a lot in Seattle?
Snowfall in Seattle is relatively infrequent and typically light. Significant snowstorms are uncommon.
How does Seattle’s rainfall compare to other US cities?
Seattle’s total annual rainfall is less than cities like New York or Atlanta. However, Seattle has more rainy days per year.
What should I pack if I’m visiting Seattle in November?
If you are visiting Seattle in November, pack waterproof clothing, including a rain jacket and waterproof shoes. An umbrella is also a good idea.
Summary
November stands out as Seattle’s wettest month due to a confluence of weather patterns and geographical factors. While Seattle experiences consistent rain throughout the fall and winter, November typically sees the highest average rainfall. Understanding these seasonal patterns can help residents and visitors prepare for the city’s characteristic damp conditions.
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