Oman Weather, climate and geography
Because Oman is so large and the terrain diverse, the climatic conditions are as varied as the geography. The most popular time to visit is from October to April when the weather is warm and sunny and temperatures range from a very pleasant 25°C (77°F) to around 35°C (95°F) during the day. It is cooler at night, ranging in temperature from 17°C (63°F) to 19°C (66°F).
From May to August, it is very hot and humid at the coastal areas, while the interior generally remains hot and dry. Between May and September, the southern Dhofar region has its own microclimate. Known as the khareef, the area catches the Indian Ocean’s monsoon season and temperatures can be 10-15°C (18-27°F) lower than the rest of the country. Most of the rain falls during the winter months and varies according to the region. Other than in Dhofar, it is rare to see rain between May and November. The coastal areas and the interior plains average 20-100mm (0.8-4 inches) of rainfall annually but this can rise to around 900mm (35 inches) in the mountains. It is common to see snowfall on the highest mountain peaks during the winter.
Lightweight cottons are advisable throughout the year, with a warm wrap for cooler winter evenings, mountain excursions and overworked air-conditioning in shops and restaurants. When touring, khaki or beige are more suitable colours to wear than white, as the dry, dusty conditions can discolour clothing.
Oman is a Muslim country and, while it is relatively moderate, visitors should be sensitive to its customs. Women should not bare shoulders or show low cleavage and should not wear short shorts or short skirts. Long shorts should ideally be below the knee. They should also carry a large scarf or pashmina with them at all times in case they need to cover their head. This is essential when visiting mosques. Men should only wear long, baggy shorts, and preferably trousers outside hotels. Swimming costumes are confined to hotel pools and beachwear should be modest. Most hotels do not require women to cover up when swimming, although women may choose to do so when bathing in the sea on public beaches.