The Saint John to Sarnia flight path was viewed by 39 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in St John is roughly greater than that of Sarnia. You can assume this to be the case over the next 18 days.
With an average temperature of 25 °C, peak weather can be found in July. As a traveller, expect to see changes in flight prices during that period. The temperatures in Sarnia are hotter than in St John.