Seattle weather in May
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Seattle May weather at a glance
In May, Seattle averages 12.8°C, with typical highs of 17.4°C and lows of 9°C. The historical average is 12 wet days and 72% humidity.
Seattle May temperature & humidity
Seattle May rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Seattle in May
Wear long sleeves with a light jacket or cardigan that is easy to remove during the day. Showers are possible, so a compact umbrella is useful.
- DaytimeLong sleeves and a light jacket · average high 17.4°C
- Morning & eveningLong sleeves with a jacket or cardigan · average low 9°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Seattle May sunrise & sunset times
2026 May · Local time (America/Los_Angeles)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-05-01 | 05:52 | 20:22 | 14h 30m |
| 2026-05-15 | 05:32 | 20:41 | 15h 9m |
| 2026-05-31 | 05:16 | 20:59 | 15h 42m |
For sunset photos, arrive before the listed sunset time. Clouds, mountains and buildings can change when the sun becomes visible or disappears.
Calculated for the city coordinates with daylight saving applied. SunCalc · tz-lookup
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Best months to visit Seattle
Bar height shows our simple weather-comfort score, not a safety rating; colour shows temperature.
May weather by year
Daily weather in 2025
Daily high and low temperatures; blue labels show precipitation
Frequently asked questions
What is Seattle weather like in May?
In May, Seattle averages 12.8°C, with typical highs of 17.4°C and lows of 9°C. The historical average is 12 wet days and 72% humidity. Our weather-comfort rating for this month is fair.
Does it rain a lot in Seattle in May?
There are about 12 wet days in May. A compact umbrella is still useful.
What should I wear in Seattle in May?
Wear long sleeves with a light jacket or cardigan that is easy to remove during the day. Showers are possible, so a compact umbrella is useful.
What are the best months to visit Seattle?
Recent weather data rates June, July, August, September among the more comfortable months.
Where can I check Seattle weather in May in real time?
Check local webcams for the view right now and a local weather service for today’s forecast. Monthly temperatures here are historical averages.
What time are sunrise and sunset in Seattle in May?
On 2026-05-15, calculated sunrise is 05:32 and sunset is 20:41 in local time (America/Los_Angeles). Times vary by date and terrain.
Seattle weather by month
More Americas destinations in May
Open-Meteo (CC BY 4.0) · 2024–2025 historical data, aggregated and rounded by this site. Not a forecast or long-term climate normal. Calculation method and limitations