May is hot across lowlands and coastal plains; mountain areas are cooler but begin to warm. Travelers should plan outdoor activities for early morning or late afternoon to avoid peak heat.
Average daily low and high (°C) and monthly rainfall. The badge shows how it feels, allowing for humidity.
Average temperature across Oman in May.
Muscat, Sohar, Barka
Humidity rises noticeably in May and coastal thermometers frequently push into the mid-to-high 30s°C; the air feels heavy in the afternoon. Swimming and hotel pools become the default escape, while city attractions are busiest early and late in the day. If you must sightsee midday, plan air-conditioned stops and avoid inland valley excursions.
Khasab, Dibba, fjords & dhow cruises
May brings warming that can push the coast into the low 30s°C by mid-month, though the peninsula’s winds hold humidity down compared with Muscat. Pelagic life is active for boat trips and diving operators begin longer routes. Book early-morning cruises to avoid heat; carry sunscreen and hydrate - afternoons are best spent in shade.
Jebel Akhdar, Jebel Shams, Nizwa
May brings warm, crisp days and cooler nights at altitude; the highlands are often the country’s most pleasant place to escape lowland heat. Trekking windows widen but afternoons grow hot in the lower Hajar slopes, so start hikes early. Pack breathable hiking layers and a warm layer for camp nights, as temperatures can drop sharply after sunset.
Sharqiyah Sands, desert wadis, Ras al Hadd approaches
May shifts the sands toward true summer heat with daytime highs frequently into the mid-to-high 30s°C; exertion during the day becomes uncomfortable. Camping remains possible but organize morning and evening activities, not midday. Make sure your desert operator stocks plenty of water, shade canopies and cooling options, and be ready for very warm nights in low-lying desert camps.
Salalah, Mirbat, khareef monsoon coast
May is the last dry month before the khareef and temperatures can reach low 30s°C inland; humidity rises as the season approaches. Operators begin to prepare for the monsoon of the south; some excursions shift to morning and late-afternoon. Pack for heat but also a light waterproof as the first coastal mists sometimes begin in late May.
There are no major festivals or events in Oman during May to be aware of.
See how May compares with the rest of the year, then read the full guide.