No no, not temperature. I set ctis to heat two. Thats what they like. I was very careful to make sure there where no eventws and no scale changes. Besides Ctis got more monwy than pythium in this test.
Temperature scales change with the seasons. Summer randomly increases Heat, and Winter randomly increases Cold. The effect is barely noticeable except when the temperature has an effect on the battlefield, e.g. the cold-blooded's penalty in cold areas or the general encumberance malus of extreme temperatures.