The influence of the high-pressure system will increase on Sunday, it is expected to remain dominant throughout the first few days of the coming week. Longer sunny periods are expected again, with only isolated clouds expected. However, in the valleys, fog or high fog may be a concern at daybreak because the air will cool noticeably during the rather long nights, allowing its moisture to partially condense into fog. During the day, as mentioned, the sun will frequently shine, and temperatures will significantly rise with it. It will be quite pleasant especially in the afternoons, and the temperatures are late summer like. On Friday, an Atlantic front is expected to reach from the west as the day progresses.