Brockville, ON:

• Mon 27 Jul: Mix of sun and cloud, 40% chance of showers with thunderstorm risk, High 27C, Low 19C

• Tue 28 Jul: Cloudy, 60% chance of showers, High 26C, Low 16C

• Wed 29 Jul: Cloudy, 40% chance of showers, High 24C, Low 16C

Source: https://weather.gc.ca/