Standard weather
If the climate data occurs within one year, it is an extremely dry climate-subtropical desert climate.
According to supplementary information, all three locations are in the southern hemisphere. A is a subtropical evergreen broad-leaved forest climate zone with the same rain and heat, and the annual rainfall is relatively uniform; B is a tropical rainforest climate, wet and rainy, with high temperature all year round; C has a Mediterranean climate, rainy in winter and dry in summer. In contrast, the climate in A is better.
Rainfall less than 10mm is a harsh and extremely dry place, and human beings can't settle down and basically can't survive.
"mm" is the unit of rainfall: millimeter or liter/square meter. The precipitation of 100 mm is equal to that of 100 L/m2. If converted into average precipitation depth, the precipitation of 100 mm is equal to 1 m2, and the average depth is 0. 1 m. There is no unit of "nm".