high-temperate

Lowell has altogether omitted to discuss. Whatever may be the mean temperature of Mars, we must take account of the long nights in its polar and high-temperate latitudes, lasting nearly twice as long as ours, with the resulting lowering of temperature by radiation into a constantly clear sky.

Alfred Russel Wallace - Is Mars habitable? A critical examination of Professor Percival Lowell's book "Mars and its canals," with an alternative explanation