I like mine too. And you are right. It is too labor intensive for American farmers to compete. But fear not. The way our country is headed, soon we will have armies of people willing to work for $2 an hour, and they will all have college degrees!
Last year we had a couple rains in late August, which is unusual. In 2012 we went 105 days without a drop. In summer, our humidity level is usually in the teens and often the signal digits. Without irrigation I would grow nothing but wheat, like 95% of the farmers in eastern Washington do. And I would pray for good spring rains to get a decent crop. Central Washington rivals the California central valley with the crops they produce. Without the Columbia River water and the Columbia Basin irrigation project, they would grow nothing but sage brush.
Ok first a video that may help us to understand better climate in our planet
Ok now about the quoted text there's something in that text that don't fit with what I've observed in Turkish videos and docs, why do you say that is a labour intensive crop? harvest may be because of the hand picking but as a crop I have a different idea, from what I have observed they plant the tobacco and almost abandon it for a 3 months period till the harvest time arrive, hey but I can be wrong, this is only my perception, anyway I have Turkish farmers contacts and I can try to speak with them, but their English is very difficult to understand, last week I've been showing a Turkish tobacco dealer how he can profit by selling seeds in ebay and the guy liked the idea lets see.
Now about the climate stuff I notice for more them once that some parts of the USA have a very similar climate with some parts of Portugal what you just described happen here at the same time, the zone where I will grow my tobacco is 125 miles away from where I am now, the place as heavy rains and cold in the winter and temps can go down to 5f, there are some rains at the spring but then everything gets very very dry and you cant grow nothing without water.
Another thing we may be forgeting to talk about are roots, they are the more important part of tobacco plants.