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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Regional Report weather desk. Data from national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Seattle has a mild oceanic climate with cool, wet winters and warm, dry summers. The live forecast above shows current conditions; typical rainfall is heaviest from October to May, while July and August bring the driest, sunniest weather.
What does Seattle’s seasonal pattern look like?
Winter days are cool and damp with frequent drizzle, while summers are pleasantly warm with low humidity. The surrounding mountains and Puget Sound moderate temperature swings.
- Winter (Dec–Feb): Average highs 8–10°C (46–50°F); rain on roughly half the days; occasional snow in the hills.
- Spring (Mar–May): Gradual warming; May often sees the first extended dry spells.
- Summer (Jun–Aug): Highs 22–26°C (72–79°F); very little rain; long daylight hours.
- Autumn (Sep–Nov): Increasing rain and cloud; September often remains warm and dry early on.
How reliable are longer-range forecasts for Seattle?
General trends for the weather in Seattle 14 day forecast or the Seattle weather 30 day forecast can indicate broad patterns, but day‑to‑day accuracy drops beyond a week. For planning, the Seattle weather 15 day forecast gives a useful overview, while the Seattle weather hourly view is best for immediate decisions.
- Check the Seattle weather in Fahrenheit or Seattle weather in degree celsius using the live forecast above or a dedicated converter.
- For an annual perspective, the Seattle weather yearly data shows the region’s consistent seasonal rhythm.
- Shorter outlooks such as the weather in Seattle 10 days are typically more reliable for actual conditions.
Does Seattle really rain all the time?
No – it rains frequently but often as light drizzle rather than heavy downpours. Seattle gets about 150 rain days per year, but total annual rainfall is modest (around 94 cm / 37 in), less than many eastern US cities.
What is the best time to visit Seattle?
July to September offers the sunniest, warmest weather with minimal rain. Spring (April–May) and early autumn (October) are also pleasant, with fewer crowds and lower accommodation costs.
How does Seattle’s climate compare to the UK’s?
Both have mild, oceanic climates, but Seattle’s summers are significantly drier and warmer than the typical UK summer. Winters are slightly cooler in Seattle, with less persistent cloud cover than in much of Britain.
For UK weather comparisons, see our UK weather hub or the 10 Day Weather Forecast UK.