Re: Perfect climate
Well, it will be a perfect match for the F-35 which can't take off (or even be outdoors) in the rain. Not without a hoodie at least.
In ancient and medieval times campaigning stopped in the winter due to unfavourable weather (and a general lack of food).
Maybe getting back to that custom would be a good first step. Then it would merely remain to extend the "no fighting" season through the summer.