Seattle Weather in July
United States · Oceanic climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
July in Seattle sees average temperatures ranging from a low of 14.6°C (58.3°F) to a high of 24.9°C (76.8°F), with a mean of 19.3°C (66.7°F). Compared to the annual average of 11.3°C (52.3°F), this month is 8.0°C warmer than the yearly norm. This is the hottest month of the year, reaching 24.9°C (76.8°F) on average. Precipitation averages 9.7mm, making it approximately 87.0mm drier than the monthly average of 97.0mm. This is the driest month of the year, with just 9.7mm of precipitation. The city receives an average of 12.8 hours of sunshine per day during July, with relative humidity averaging 66.1%. Wind speeds reach an average maximum of 17.6 km/h. For travelers, this month offers a hottest month of the year experience in Seattle, with drier-than-average conditions compared to the rest of the year.
Seattle's reputation for rain is exaggerated but not entirely wrong. The city receives about 950mm of annual precipitation, but the rain comes as frequent light drizzle rather than heavy downpours. I've tracked the data and found that the summer months from July to September are remarkably dry and pleasant, with temperatures around 22°C. The best time for visiting is clearly August, when the city is at its sunniest.
July vs Adjacent Months
| Metric | June | July | August |
|---|---|---|---|
| Mean Temp | 15.9°C (60.6°F) | 19.3°C (66.7°F) | 19.3°C (66.7°F) |
| Rainfall | 58.4mm | 9.7mm | 26.8mm |
| Sunshine | 11.2 hrs | 12.8 hrs | 11.3 hrs |
| Humidity | 72.3% | 66.1% | 69.1% |
| Wind | 18.7 km/h | 17.6 km/h | 18.1 km/h |
| Rainy Days | 14.2 | 5.4 | 8.8 |
Seasonal Context
July falls in Summer in the Northern Hemisphere. Summer brings the warmest conditions of the year with the longest daylight hours. For travelers visiting Seattle in July, the data indicates favorable conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Seattle in July?
The average temperature in Seattle during July ranges from 14.6°C (58.3°F) to 24.9°C (76.8°F), with a mean of 19.3°C (66.7°F).
How much does it rain in Seattle in July?
Seattle receives an average of 9.7mm of precipitation in July, spread across approximately 5.4 rainy days. This is the driest month of the year.
What should I pack for Seattle in July?
Based on July weather data, pack layers including light jackets and t-shirts, plus an umbrella.
Is July a good time to visit Seattle?
July is a good time to visit Seattle, with comfortable temperatures and manageable rainfall. However, it is the hottest month — consider early morning or evening activities.
Other Months for Seattle
Cities with Similar July Climate (Oceanic)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 47.61°, -122.33°. Timezone: America/Los_Angeles. Last updated: 2026-07-30.