I would like to fix the weather for the start of game in some specific weather theaters. I don't think it is possible but wanted to doublecheck.
If it is not possible, it would be a nice feature for scenario designers and modders. In some cases, historic weather is necessary if you want one side or the other to be able to accomplish certain objective. Nothing worse than setting up a scenario in which historically one side was off to the races at games start and then cranking up the scenario and finding rain everywhere. Of course, if the weather had been miserable, it is very probably this optional declaration of war would have been delayed for better weather. Ummm, maybe an event could give that option for a turn or two.