Monthly weather overview

iconSeattle monthly weather overview United States · 시애틀

A quick, year-round overview of monthly and seasonal weather in Seattle. Use this page to get a feel for which months and seasons match your travel style.

Seattle weather at a glance

  • Seattle has a marine west coast climate: temperatures are rarely extreme, but the city often feels **cool and damp** across much of the year.
  • Instead of constant downpours, a common pattern is **light rain/drizzle that lasts**—especially from October to March.
  • Summer (especially Jul–Sep) is surprisingly **dry and bright** compared with the city’s rainy reputation.
  • In winter, humidity and wind can make it feel colder than the thermometer suggests.
  • Daylight swings are real: long summer evenings vs short winter days can change how a trip feels.
Nov · Dec · Jan · Feb · Mar

Late fall to winter (cool + wet): frequent rain and long stretches of gray

Avg low 1–5°C / high 7–11°C · Rainy days: 12–18 / ~80–160 mm (varies by year)

  • Light rain and drizzle can be more common than heavy storms.
  • Wind can make it feel noticeably colder.
  • Short daylight can make evenings feel long.

Suggested outfits

  • · Water-resistant outer layer
  • · Sweater/hoodie layers
  • · Optional grippy shoes

A note for travelers

In winter Seattle, rain and wind management often matters more than heavy insulation.

Apr · May · Jun

Spring (variable): more clear breaks, but showers still happen

Avg low 4–10°C / high 12–20°C · Rainy days: 8–15 / ~40–90 mm

  • You can see sun and showers in the same day.
  • When the sun comes out, it can feel much warmer fast.
  • Evenings can still feel cool—layers help.

Suggested outfits

  • · Light rain jacket or wind layer
  • · Layering pieces
  • · Optional compact umbrella

A note for travelers

Spring is easier when you’re prepared to stay comfortable even if you get lightly wet.

Jul · Aug · Sep

Summer (drier + mild): bright days, cool evenings

Avg low 12–15°C / high 22–26°C (warmer on some days) · Rainy days: 3–6 / ~15–45 mm

  • Even on warm days, shade and evenings can feel cool.
  • Long daylight makes outdoor time feel longer.
  • On occasional hot spells, comfort changes quickly.

Suggested outfits

  • · T-shirts + thin evening layer
  • · Sunglasses/sunscreen
  • · Comfortable walking shoes

A note for travelers

Summer Seattle often feels easy for parks, waterfront walks, and café-hopping.

Oct

Fall (rain returns): frequent rain and a faster cool-down

Avg low 7–9°C / high 13–16°C · Rainy days: 12–18 / ~80–130 mm

  • Rain becomes frequent again.
  • Humidity + wind can feel chillier.
  • Daylight shortens quickly.

Suggested outfits

  • · Rain-ready outer layer
  • · Layers
  • · Optional water-resistant shoes

A note for travelers

From October, it helps to dress for walking even if the forecast includes steady drizzle.

Want detailed monthly weather?

Pick a month below to see detailed average temperatures, rainfall, outfit ideas, and travel tips.

Explore Seattle

These pages are connected so you can compare conditions and decide for yourself.

Seattle monthly weather overview — seasons & best time to visit | CityWeather | CityWeather