Omanis always talk about 2 seasons: the “hot” and the “cold”
The “hot” season starts in April and lasts in October. Temperatures are at that time always above 35 / 40 degrees during the day. During the hottest days of summer, the temperature can reach 50 or more degrees during the day and more than 30 during the night.
The “cold” season is in winter, from November to March. Temperatures are then very pleasant. It can even sometimes be cool even in low-lands. Average temperatures are around 25 degrees during the day and 15 during the night. In higher altitude it is then cold (over 2000 m, the temperatures can drop down 0 during the night).
Northern Oman is influenced by the Mediterranean depression system. Rainfalls are unregular and can occur at any time during the year, even if they are more likely to happen in Winter and at season changes. There can also be convection thunderstorms in the mountains.
Dhofar has a completely different weather: a dry season and a rainy season. The Monsoon’s tails hit the mountains of Dhofar between July and September and the region is then foggy and all green. After the rainy season all the greenery dries and the leaves of the trees fall.