When will the outside temperature of the Fraser Valley B.C. Canada reach an average of 13 degrees Celsius?

Question

I have a seedling (of a tree) and my Dad explained that it grew in relation to what it thought the time of the year was from the temperature in my room and that if I were to plant it and it were to get too cold it would hurt the plant.

Answer 1

According to world climate, the average high in May is 21.3C and the average low is 6.9C.  So, the average temp in May is 14.1C.  I would say by mid-late May then.