Climate almanac
Cornwall
Ontario, Canada · 45.02°, -74.73°
What is the weather like in Cornwall in August?
In August, Cornwall is typically 79°F (26°C) during the day and 61°F (16°C) at night. The month brings about 4.7 in (118 mm) of precipitation in total.
- Average high79°F (26°C)
- Average low61°F (16°C)
- Precipitation4.7 in (118 mm)
- Clear or mostly clear days10
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)