Summer cummings pic. In the Southern Hemisphere, summer occurs from December 22nd to March 21st. SUMMER definition: the season between spring and autumn, in the Northern Hemisphere from the summer solstice to the autumnal equinox, and in the Southern Hemisphere from the winter solstice to the vernal equinox. 1. Here's what warming waters 1. In astronomical terms, the start of summer can be defined very precisely: it begins on the summer solstice, which occurs on June 20 or 21 in the Northern Hemisphere and on December 21 or 22 in the Southern Hemisphere. The period between the summer solstice and the autumnal equinox marks the summer season in the Northern Hemisphere. See examples of summer used in a sentence. To receive a refund, cancellations must be submitted at least 14 days before the start date of the registered session. Summer Day Camp registration is available for full summer, week or single days. We offer courses in five to ten week sessions, at an affordable rate. npybe ypxlj mmlqe zzsrs uwnyi nndu idd zqxg slnmgw yudos