Climate almanac
Thunder Bay
Ontario, Canada · 48.38°, -89.25°
What is the weather like in Thunder Bay in August?
In August, Thunder Bay is typically 72°F (22°C) during the day and 56°F (13°C) at night. The month brings about 2.7 in (69 mm) of precipitation in total.
- Average high72°F (22°C)
- Average low56°F (13°C)
- Precipitation2.7 in (69 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)