The four seasons of the year in the Northern Hemisphere are March, April, and May for spring, June, July, and August for summer, September, October, and November for fall, and December, January, and February for winter. This is divided according to temperature.
By month, spring is January, February and March, summer is April, May and June, fall is July, August and September, and winter is October, November and December.
Expanded:
Climatically, the four seasons are distinguished by temperature. In the Northern Hemisphere, spring generally falls from March to May, summer from June to August, fall from September to November, and winter from December to February each year. In the Southern Hemisphere, the timing of the seasons is just the opposite of the Northern Hemisphere. When it is summer in the Southern Hemisphere, it is winter in the Northern Hemisphere; when it is winter in the Southern Hemisphere, it is summer in the Northern Hemisphere. There is no clear boundary between the seasons, the change of seasons is gradual.
Archanging Law
From the spring equinox through the summer solstice to the fall equinox, the northern hemisphere is in the summer half of the year, the southern hemisphere is in the winter half of the year. During this period, the northern hemisphere day is long and night is short, the southern hemisphere day is short and night is long; the north pole is in the polar day, the south pole is in the polar night; the sun's altitude north of the Tropic of Capricorn is always greater than the average, south of the Tropic of Capricorn is less than the average. North of the Tropic of Cancer the sun rises on the northeast horizon and sets on the northwest horizon. The sun rises due east and sets due west across the globe on the second equinox.
From the autumnal equinox through the winter solstice to the vernal equinox, the northern hemisphere is in the winter half of the year, the southern hemisphere in the summer half of the year. During this period, the length of day and night, the extreme day and night, and the altitude of the sun in the northern and southern hemispheres are the opposite of those described above. North of the Tropic of Cancer, the sun rises on the horizon in the southeast and sets on the horizon in the southwest.
From the summer solstice through the autumnal equinox to the winter solstice, the northern hemisphere changes from half a year of summer to half a year of winter, and the southern hemisphere changes from half a year of winter to half a year of summer. During this period, the northern hemisphere day is shorter, the night is longer, the polar day zone is gradually shrinking; the southern hemisphere day is longer, the night is shorter, the polar night zone is gradually shrinking. The sun's altitude decreases north of the Tropic of Capricorn and increases south of the Tropic of Capricorn. North of the Tropic of Cancer, the direction of sunrise changes from northeast to southeast, and the direction of sunset changes from northwest to southwest. The autumnal equinox rises from due east and sets due west.
Reference:Baidu Encyclopedia - The Four Seasons