Summer

Summer is a season, defined by convention in meteorology as the whole months of June, July and August in the Northern hemisphere and the whole months of December, January and February in the Southern hemisphere. The first day of summer in the Northern hemisphere is either June 21 or June 1 (the former is the astronomical start, the latter the meteorological). Summer is commonly viewed as the season with the longest (and warmest) days of the year, in which the daylight predominates, through varying degrees. In the northern latitudes, twilight is known to last at least an hour, sometimes leading to the famous white nights found in St. Petersburg and Scandinavia.

See also

• Axial tilt
• Autumn
• Spring
• Winter