Seattle weather in August
Monthly temperatures, rain, humidity, what to wear and what to pack — 2024–2025 historical average
Seattle August weather at a glance
In August, Seattle averages 19.3°C, with typical highs of 24.6°C and lows of 15.1°C. The historical average is 7 wet days and 71% humidity.
Seattle August temperature & humidity
Seattle August rain & wet days
Pack a compact umbrella. Keep an indoor stop available between outdoor activities.
What to wear in Seattle in August
Choose breathable summer clothes and pack sun protection.
- DaytimeBreathable short sleeves, hat and sunscreen · average high 24.6°C
- Morning & eveningLong sleeves with a jacket or cardigan · average low 15.1°C
- FootwearComfortable walking shoes; quick-dry footwear for rainy days.
Packing essentials
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Seattle August sunrise & sunset times
2026 August · Local time (America/Los_Angeles)
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 2026-08-01 | 05:47 | 20:43 | 14h 56m |
| 2026-08-15 | 06:05 | 20:21 | 14h 16m |
| 2026-08-31 | 06:27 | 19:51 | 13h 24m |
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.
August 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 August?
In August, Seattle averages 19.3°C, with typical highs of 24.6°C and lows of 15.1°C. The historical average is 7 wet days and 71% humidity. Our weather-comfort rating for this month is excellent.
Does it rain a lot in Seattle in August?
There are about 7 wet days in August. A compact umbrella is still useful.
What should I wear in Seattle in August?
Choose breathable summer clothes and pack sun protection.
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 August 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 August?
On 2026-08-15, calculated sunrise is 06:05 and sunset is 20:21 in local time (America/Los_Angeles). Times vary by date and terrain.
Seattle weather by month
More Americas destinations in August
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