Seattle weather in July
July in Seattle: warm, dry, with clean air — one of the best months to visit.
#1 of 12 months in Seattle · #10 of 604 destinations to visit in July · comfort 95/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Seattle climate normals — July
| Daytime high | 25°C / 78°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 16 mm / 0.6 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 12.3 h/day | |
| Daylight | 15.5 h | |
| Wind | 11 km/h / 7 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Seattle in July — FAQ
- Is July a good time to visit Seattle?
- July in Seattle: warm, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Seattle on SeasonMap's comfort score (95/100).
- What is the weather like in Seattle in July?
- In July, Seattle averages a daily high of 25.3°C and a low of 14.5°C, with about 15.7 mm of rain over roughly 4.2 rainy days.
- What is the air quality in Seattle in July?
- Seattle has a mean US Air Quality Index of about 35 in July.