Exterior wall shell wet - normal?

I would suspect that it is simply condensation. The fogged-up window seems to confirm this, as at least that one should be "watertight". Let’s put the cart before the horse: What could be the cause of the dry spot? Does the sun shine there, is the masonry thicker/additionally insulated there, somehow protected, does any heat come from somewhere?

Hard to imagine if a steam bath is not being operated inside. There isn’t even screed in there yet.

If you have several days of cold weather and the wall has cooled down accordingly, just one day of sunshine with the corresponding air temperatures can produce such a result.

A picture from the outside would be interesting. But as long as there are no windowsills and plaster on it yet, the picture is not extraordinary. The masonry is wet because it had already absorbed quite a bit before when there was no roof on it, and additionally, the moisture cannot really escape because new moisture is coming in from inside and outside.

Such a picture can mean nothing and everything.

So first of all, thanks for the answers, at least the helpful ones. The window is not fogged up, I did that because directly behind it were two neighbors who maybe did not want to be shown. The mentioned wall is the wind/rain side and the roof slopes in that direction as well. The gutter was only finally completed last week, before that all the water ran down the house wall or was diverted with hoses until the gutters were installed. On the other sides everything is dry. One side is flush with the house, the front side where the gate is does not get rain (so it doesn’t whip directly in front) and on the left side there is no window where rain could come in at least from the outside. From the outside there are bricks, with a few centimeters of air space in between. Due to the not yet installed windowsill, a lot of rain got into the bricks. Where the door and the window can be seen. I thought about whether it could have spread that far. The site manager said that it really comes from the ceiling and the two openings because it rained for a few weeks and only recently the roofing felt was put on, which then made it watertight. So the concrete ceiling and of course the masonry above absorbed water that way. Putting roofing felt on directly was not possible because it needed at least one or two days of dry weather for that.