Hello translator.cat--sorry, but I would not translate "The temperature is rising by the hour" as you have. If it were "by the minute", yes, definitely, but "by the hour" is a little slower.
And if this were the sense of the original sentence in this thread, it would have had to be "I feel quieter by the hour", I think (greenie said "more quiet" but the sense is the same). Looking back on this thread now I would probably just have agreed with greenie's first comment--it was a strange sentence in English.