First Day Of Summer 2025 Canada Weather. Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth's axis having reached. When is the first day of summer and why does it differ each year?

As environment canada calls the southern alberta precipitation forecast a coin toss, farmers are expressing concerns beyond the control of mother nature. The data correspond to the seasons of the year 2025.