The high latitudes have short, hot summers, and long, severe winters.
The transition seasons, spring and autumn, on account of the very rapid
change in the length of the days, are short and scarcely perceptible.
In the middle latitudes the summer and winter are more nearly equal in
length, with less difference in the extreme temperatures; and the
transition seasons are distinctly marked. Farther towards the Equator
the summer increases in length, and the winter diminishes, while the
tropical latitudes have constant summer.