The four seasons (winter, spring, summer, autumn) have a huge impact on Spring - March, April, May Spring It's simple to know when spring is arriving. The sun rises in the days get slightly warmer. Spring flowers start to appear, birds start spring is very varied. Some days it may be cold enough to snow, and some days it is warm enough to play out in the garden. Spring months can also be awfully windy. Weather varies though in spring, worldwide.