Ar Rayyān, Qatar in September has hot conditions, with highs reaching 40°C (104°F) and afternoons the warmest part of the day. Rain is rare, falling on about 0 days this month. Temperatures drop noticeably between day and night. Sea temperature reaches 33.7°C (93°F).
This month falls at the beginning of Autumn. Temperatures are at their seasonal peak.
Daily highs in September gradually drop from around 41°C (106°F) at the start to 39°C (101°F) by month's end.
The warmest days tend to fall around the 7th, averaging 41.4°C (107°F).