Seattle climate
United States
First-time visitors often notice “tiring weather” before they label it as hot or cold in Seattle.
Seattle climate can look simple on averages, but travel comfort is often driven by humidity, wind, and rain.
Climate facts
Nov · Dec · Jan · Feb · Mar
Avg low 1–5°C / high 7–11°C · Rainy days: 12–18 / ~80–160 mm (varies by year)
Apr · May · Jun
Avg low 4–10°C / high 12–20°C · Rainy days: 8–15 / ~40–90 mm
Jul · Aug · Sep
Avg low 12–15°C / high 22–26°C (warmer on some days) · Rainy days: 3–6 / ~15–45 mm
Oct
Avg low 7–9°C / high 13–16°C · Rainy days: 12–18 / ~80–130 mm
How it tends to feel for travel
Rainier seasons can feel heavier even at similar temperatures, simply because you spend more time damp or under clouds.
When it tends to fit
- • Once you see the year-round pattern, it’s easier to judge whether a month fits your style.
- • If you revisit the city, separating “seasonal itineraries” can save a lot of planning time.
When it may not fit
- • If you rely only on averages, you may be surprised by variability (squalls, wind, indoor AC).
- • In monsoon-like periods, the more your itinerary depends on outdoor walking, the higher the risk.
- • If you’re fine with cold but hate damp chill, it can feel colder than you expect.
Outfit notes
This connects climate patterns to packing—without over-interpreting.
- • 🧭 Key idea: In Seattle, comfort is often shaped less by extreme cold and more by **dampness, wind, and frequent light rain**. A rain-ready outer layer matters.
- • 🌧️ Oct–Mar: expect many wet days. A water-resistant jacket plus layers is the most reliable setup.
- • 🌦️ Spring (Apr–Jun): sun and showers can alternate quickly—dress so you’re okay getting lightly wet.
Once you lock in a couple of constraints, the decision gets much easier.
Explore Seattle
These pages are connected so you can compare conditions and decide for yourself.