Seattle weather in July
Temperature, sea and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: July – September
What is the weather like in Seattle in July?
In July, Seattle is warm: daytime highs average 24 °C, and nights cool down to about 14 °C. The sea averages 11.4 °C – swimming is only for the hardy. With around 10 hours of sunshine a day, there is plenty of sun. Rain falls on about 5 days, adding up to 28 mm. All in all, July is an excellent month for a holiday in Seattle.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 15 h 38 min05:26 – 21:04
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 12 km/haverage daily peakAll months
- Cloud cover
- 42 %on averageAll months
- Hot days
- 2 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−7America/Los_Angeles
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 30 %91 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
Seattle in July: quick answers
Is Seattle hot in July?
Warm rather than hot: in July, daytime highs in Seattle average 24 °C and nights cool to about 14 °C. On about 2 days the thermometer climbs to 30 °C or more.
Can you swim in Seattle in July?
Only if you don't mind cold water: in July the sea averages just 11.4 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Seattle in July?
Rain falls on about 5 days, adding up to 28 mm.
Seattle month by month
The whole year in SeattleAll destinations: USAWhere to go in JulySea temperature in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences