Climate almanac
Mercer Island
Washington, United States · 47.57°, -122.22°
What is the weather like in Mercer Island in July?
In July, Mercer Island is typically 77°F (25°C) during the day and 59°F (15°C) at night. The month brings about 0.7 in (18 mm) of precipitation in total.
- Average high77°F (25°C)
- Average low59°F (15°C)
- Precipitation0.7 in (18 mm)
- Clear or mostly clear days16
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)