When Is Spring 2025 In Canada Ontario. Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic. Summer starts at the moment when the sun is farthest north:
As we close the chapter on winter with what seemed like an early spring, ontario is being reminded that winter isn’t going out without a bang. Here’s what to expect in ontario.