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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scene Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
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Seattle’s weather is famously mild and damp, with cool, overcast winters and pleasantly dry summers. The live forecast above shows today’s conditions, but for planning a trip, the key is knowing when the rain lifts and which layers to pack.
What is the best time to visit Seattle?
July through September offer the most reliable sunshine, with average highs around 24°C (75°F) and very little rain. This is the peak season for outdoor markets, kayaking on Puget Sound, and hiking in the nearby Cascades. If you don’t mind clouds, May and June are also fine, though you’ll still want a rain jacket handy. For snowbirds and March-break travellers, late March can be wet and chilly—temperatures hover near 10°C (50°F)—so pack accordingly.
What should I pack for Seattle weather year round?
A waterproof jacket is non-negotiable any month. From October to April, add a warm mid-layer, waterproof shoes, and an umbrella (locals rarely use them, but visitors find them helpful). Summer calls for light layers, sunglasses, and sunscreen—the sun can be surprisingly strong. For a detailed Canada weather hub comparison, see our seasonal guides. Checking a seattle weather 14 day or seattle weather hourly forecast before departure is wise, as conditions shift quickly.
Does Seattle get snow?
Snow is rare, averaging only a few centimetres per year. When it does fall—usually in December or January—the city often shuts down briefly because hills become icy.
Is Seattle weather better than Vancouver’s?
They are nearly identical: both have a marine climate. Seattle tends to be slightly sunnier in summer, while Vancouver gets marginally less rain in winter. For a different warm-weather escape, see Cancun Weather.
How do I read the temperature in Celsius?
All Canadian forecasts use Celsius. To convert from Fahrenheit, subtract 32 and multiply by 5/9. For quick reference, a typical Seattle summer day of 24°C equals about 75°F.