Seattle

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Climate and Weather

Details about Seattle's weather patterns and tips on how to prepare for the city's climate.

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Overview of Seattle’s Climate

Seattle has a temperate marine climate (also known as an oceanic climate), characterized by mild, wet winters and cool, relatively dry summers. The city is often associated with rain, but its annual rainfall is moderate compared to other U.S. cities. What sets Seattle apart is the frequency of overcast skies and light drizzle, especially in the fall and winter months.

Seasonal Weather Patterns

Here’s a breakdown of Seattle’s weather by season:

1. Winter (December to February)

  • Temperature: Average highs range from 45°F to 50°F (7°C to 10°C), with lows around 36°F to 40°F (2°C to 4°C).
  • Rainfall: This is the wettest season, with frequent rain and overcast skies. December is typically the rainiest month.
  • Snow: Snowfall is rare but possible, with occasional light snow or slush. Major snowstorms are uncommon but can disrupt the city when they occur.
  • Daylight: Days are short, with only about 8-9 hours of daylight in December.

Tips for Winter:

  • Attire: Wear waterproof jackets, sturdy shoes or boots, and layers to stay warm and dry. Umbrellas are less common among locals, who often prefer waterproof outerwear.
  • Activities: Visit indoor attractions like the Seattle Art Museum, Museum of Pop Culture (MoPOP), or Pike Place Market. Winter is also a great time for cozy coffee shop visits, as Seattle is famous for its coffee culture.

2. Spring (March to May)

  • Temperature: Average highs range from 52°F to 65°F (11°C to 18°C), with lows between 40°F and 48°F (4°C to 9°C).
  • Rainfall: Rain continues but becomes less frequent as the season progresses. Expect a mix of sunny and rainy days.
  • Nature: Spring brings blooming cherry blossoms and vibrant greenery, especially in parks like the Washington Park Arboretum and Discovery Park.

Tips for Spring:

  • Attire: Dress in layers, as temperatures can vary throughout the day. A light waterproof jacket is still essential.
  • Activities: Enjoy outdoor activities like walking along the waterfront, visiting the Seattle Japanese Garden, or taking a ferry ride to nearby islands.

3. Summer (June to August)

  • Temperature: Average highs range from 70°F to 79°F (21°C to 26°C), with lows around 55°F to 60°F (13°C to 16°C).
  • Rainfall: Summers are relatively dry, with July and August being the driest months. Clear, sunny days are common.
  • Humidity: Humidity is low, making the weather comfortable.
  • Daylight: Days are long, with up to 16 hours of daylight in June.

Tips for Summer:

  • Attire: Light clothing like t-shirts, shorts, and dresses are suitable, but bring a light jacket for cooler evenings.
  • Activities: Take advantage of the sunny weather by exploring outdoor attractions like the Space Needle, Chihuly Garden and Glass, or kayaking on Lake Union. Hiking in nearby areas like Mount Rainier National Park or Snoqualmie Falls is also popular.

4. Fall (September to November)

  • Temperature: Average highs range from 70°F (21°C) in early September to 50°F (10°C) in November. Lows drop from 55°F (13°C) to 40°F (4°C).
  • Rainfall: Rain returns in October, and November is one of the wettest months. Overcast skies become more frequent.
  • Foliage: Fall colors are beautiful in Seattle’s parks and surrounding areas.

Tips for Fall:

  • Attire: Layered clothing and waterproof gear are essential as temperatures cool and rain increases.
  • Activities: Enjoy fall foliage at Green Lake Park or Kubota Garden. Indoor activities like visiting the Seattle Aquarium or attending cultural events are also great options.

Rainfall and Overcast Skies

  • Annual Rainfall: Seattle receives about 37 inches (94 cm) of rain annually, which is less than cities like New York or Miami. However, the rain is spread out over many days, with light drizzle being more common than heavy downpours.
  • Rainy Days: Seattle experiences about 150-200 rainy days per year, but many of these are light showers rather than all-day rain.
  • Cloud Cover: The city is known for its overcast skies, especially from October to May. Sunny days are more frequent in the summer.

Adapting to Rain:

  • Locals often skip umbrellas and rely on waterproof jackets with hoods.
  • Invest in waterproof shoes or boots to stay comfortable during wet weather.
  • Embrace the rain! Seattleites are used to it and rarely let it disrupt their plans.

Unique Local Considerations

  1. Microclimates: Seattle’s neighborhoods can experience slightly different weather due to its hilly terrain and proximity to water. For example, areas near Puget Sound may feel cooler and windier.
  2. Seasonal Affective Disorder (SAD): The long, gray winters can affect mood and energy levels. Many residents use light therapy lamps or take vitamin D supplements to combat this.
  3. Traffic and Rain: Rainy weather can slow down traffic, so plan extra time for commutes during wet conditions.

Attire Recommendations

  • Year-Round Essentials: Waterproof jacket, comfortable walking shoes, and layers.
  • Winter: Add warm hats, gloves, and scarves.
  • Summer: Sunglasses, sunscreen, and breathable clothing for sunny days.
  • Fall/Spring: Versatile layers and waterproof footwear.

Activities Suited to Seattle’s Climate

  • Rainy Days: Explore indoor attractions like the Seattle Underground Tour, Pacific Science Center, or local bookstores like Elliott Bay Book Company.
  • Sunny Days: Visit outdoor landmarks like Kerry Park for stunning views of the city and Mount Rainier, or enjoy a picnic at Gas Works Park.
  • Year-Round: Take advantage of Seattle’s vibrant food scene, from fresh seafood to international cuisine, and its thriving coffee culture.

Final Tips for Visitors and Residents

  • Be Prepared for Rain: Always carry a waterproof jacket or umbrella, even in summer, as weather can change quickly.
  • Enjoy the Outdoors: Seattle’s natural beauty is a major draw, so don’t let the rain deter you from exploring parks, trails, and waterfront areas.
  • Plan for Short Winter Days: Make the most of daylight hours during the winter months, as it gets dark early.
  • Embrace the Culture: Seattleites are known for their love of coffee, tech innovation, and outdoor activities. Join in and enjoy the city’s unique vibe!

By understanding and adapting to Seattle’s climate, you’ll be well-prepared to enjoy everything this vibrant city has to offer, rain or shine!