The coastal areas are slightly influenced by the Persian Gulf, and have lower maximum, but higher minimum temperatures and a higher moisture percentage in the air.
Summer (June to September) is very hot with low rainfall. Daily maximum temperatures can reach easily 40°C or more.
Winter is cooler with occasional rainfall. Spring and autumn are warm, mostly dry and pleasant, with maximum temperatures between 25°C and 35°C and cooler night Temperatures between 15 and 22°C.
A hot, dust-laden wind, the Shamal, blows in the spring and summer-period, from March till August.
Sometimes these winds can be very strong, and cause Sandstorms, that can occur throughout the year, although they are most common in the spring. Most rain falls during the winter months in sudden, short but heavy cloudbursts and thunderstorms.
Lightweight cottons and linens are worn during summer months, with warm clothes for cooler evenings and during the winter. Rainwear is advisable during winter.
The climate of Qatar can be classified as BWh climate; a hot, dry desert climate with the annual average Temperature above 18°C.