May in Muscat averages a daily high of 39.3°C. Rain is rare — about 0.1 wet days and 6.4mm across the month. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Muscat is December–February.
Based on SEEB INTERNATIONAL, MU (12.7km), 1995–2024. 14 years of May data.