Ace, you are mixing your cause and effect. The senshi as a faction, and their uniform, are older than the Crystal cities; so they do not wear skirts because the city is warm; the city is warm because they all wear skirts.
Because we must remember then the Crystal cities, currently and for the near future, are actually huge space stations, with closed enviroments. They will be at whatever temperature the life suport technicians set the thermostat. Japanese weather is nice... until you visit in a place like, say, Costa Rica or the Canaries, with 20-25 degrees year round.
Need a couple weeks of spring for the Sakura trees to flower? You push the "spring" button. Want snow for christmas? Fiddle with the rain sprinklers unitl it snows. A perfect summer week for the city founding aniversary? Up the temperature a couple decrees and open a bit the UV screens to get more sun.
Also, the mad static? A proper engineer would get rid of it. The Crystal cities were designed by Fen. So they did not even try to get rid of it; it dischargeds in huge storms of kilometer-long lightning...
Because we must remember then the Crystal cities, currently and for the near future, are actually huge space stations, with closed enviroments. They will be at whatever temperature the life suport technicians set the thermostat. Japanese weather is nice... until you visit in a place like, say, Costa Rica or the Canaries, with 20-25 degrees year round.
Need a couple weeks of spring for the Sakura trees to flower? You push the "spring" button. Want snow for christmas? Fiddle with the rain sprinklers unitl it snows. A perfect summer week for the city founding aniversary? Up the temperature a couple decrees and open a bit the UV screens to get more sun.
Also, the mad static? A proper engineer would get rid of it. The Crystal cities were designed by Fen. So they did not even try to get rid of it; it dischargeds in huge storms of kilometer-long lightning...