Original: The nights are always cool (or colder in winter), with daytime temperatures generally rising about +9 \/O/ 10 Â C (+15 \/O/ 18 Â F).
Simplified: The nights are always cool (or colder in winter) Daytime temperatures generally always rise about +9 \/O/ 10 CÂ (+15 \/O/ 18 FÂ) every day.