Seattle, Washington, is famous for its lush greenery, coffee culture, and tech-driven economy. But what often captures visitors’ attention first is its weather. From drizzly winters to mild summers, understanding Seattle’s climate is key to planning your day, week, or even an entire visit. Here’s a complete guide to Seattle’s weather, seasonal patterns, snowfall, and practical tips.
Seattle’s General Climate Overview
Seattle has a temperate oceanic climate, influenced by its location between the Puget Sound and the Cascade Mountains. This results in mild temperatures year-round, but a higher frequency of precipitation compared to much of the U.S.
- Average annual temperature: 52°F (11°C)
- Annual precipitation: ~37 inches (940 mm)
- Average annual snowfall: 6–8 inches (15–20 cm), though it can vary significantly
The city experiences cloudy and rainy conditions for most of the year, especially during fall and winter, while summer is relatively dry and sunny.
Seasonal Weather in Seattle
Winter (December – February)
Winter is cool, wet, and often overcast. Average temperatures range from 36–47°F (2–8°C). Rainfall is frequent, and snow is occasional, usually limited to light accumulations. Frost and icy mornings can occur, particularly in higher elevations.
Tips: Bring waterproof jackets, sturdy shoes, and layers to stay warm.
Spring (March – May)
Spring in Seattle is mild, with temperatures gradually rising from 46–63°F (8–17°C). Rain showers remain common, but you’ll notice longer daylight and the emergence of cherry blossoms and other spring blooms.
Tip: Light jackets and an umbrella are essential. Layering helps with fluctuating temperatures.
Summer (June – August)
Summer is the sunniest season, with temperatures between 55–75°F (13–24°C). Rain is rare, making it ideal for outdoor activities like hiking, boating, and exploring parks. The low humidity makes the mild temperatures feel pleasant.
Tip: Sunglasses, sunscreen, and light clothing are recommended for summer adventures.
Fall (September – November)
Fall brings cooler temperatures, ranging from 48–65°F (9–18°C), and an increase in rainfall as the city transitions into winter. The changing colors of the trees make this season particularly picturesque.
Tip: Layered clothing and waterproof gear are advisable for comfort during fall outings.
Precipitation & Rain Insights
Seattle is often associated with rain, and for good reason: it has around 150 rainy days per year. However, most of these days involve light drizzle rather than heavy storms. Rain is heaviest in November through January, while summer sees far fewer rainy days.
Key fact: The rain contributes to Seattle’s lush greenery but doesn’t usually cause flooding or extreme weather events.
Snow Insights in Seattle
Snow is relatively rare in Seattle, especially in the city center, but it can occur from December to February. When it does, it often disrupts transportation since Seattle is more accustomed to rain than snow.
- Average snowfall: 6–8 inches per year
- Snow events: Usually short-lived, melting within a few days
- Heaviest snow years: Occasionally, 12–18 inches accumulate during significant storms
Tip: If you’re planning winter travel, keep an eye on weather forecasts and local advisories, as even light snow can affect road conditions.
Current Weather Forecast (Seattle, WA)
For accurate, real-time updates, consult trusted sources like the National Weather Service, WeatherAPI, or Open-Meteo. Typical winter mornings are cloudy and cool, with temperatures in the mid-40s (7–8°C), while summer afternoons can reach the low 70s (22–23°C).
Quick reference:
- Morning: Often foggy or drizzly in winter
- Afternoon: Cloud cover may break in spring/summer
- Evening: Temperatures drop 5–10°F from daytime highs
How to Prepare for Seattle Weather
- Layer Clothing: Temperatures vary significantly between day and night.
- Waterproof Gear: Rain jackets, umbrellas, and waterproof shoes are must-haves.
- Monitor Forecasts: Use apps or official weather services for real-time updates.
- Seasonal Adjustments: Plan outdoor activities in summer or early fall for the best conditions.
- Snow Preparedness: Keep an eye on alerts for rare snow events during winter.
Conclusion
Seattle’s weather is defined by mild temperatures, frequent rain, and occasional snow. While winter is cool and wet, summer offers mild and sunny conditions perfect for outdoor activities. By understanding seasonal patterns, precipitation, and snow trends, you can plan your daily life, travels, and special events around Seattle’s unique climate.
Whether you’re a local or a visitor, staying informed with accurate forecasts ensures comfort, safety, and the ability to enjoy everything this vibrant city has to offer.