When will summer officially start in UAE?
Expect rising heat, longer days, and humid nights across the Emirates
DUBAI: If you think summer has already arrived in Abu Dhabi and Dubai, you’re not alone.
Soaring temperatures, humid nights, and steaming sunglasses all suggest the UAE is deep into the heat – but that’s not quite accurate. Despite the intensifying weather, summer hasn’t officially begun yet in the Emirates.
According to astronomical data, the official start of summer in Abu Dhabi and Dubai is Saturday, June 21. This date coincides with the summer solstice, the point in the year when the sun reaches its highest position in the sky in the Northern Hemisphere.
It’s also the longest day and shortest night of the year, marking the true seasonal shift into summer.
What is the summer solstice?
The solstice is more than just a calendar event – it’s a celestial occurrence. The word "solstice" comes from Latin, combining sol (sun) and sistere (to stand still). It marks the time when the Earth's axial tilt leans most directly towards the sun, causing the sun to appear to pause at its highest point at noon.
For the UAE, this means that on June 21, the sun stands directly over the Tropic of Cancer (located at 23.37° North), the line of latitude closest to the country. The result? The maximum number of daylight hours in the year – a signal that summer is officially in full swing, regardless of how hot it already feels.
Despite the increased sunlight, the temperature doesn’t spike suddenly on this day. The National Centre of Meteorology (NCM) notes that June temperatures rise gradually, increasing by around 2°C to 3°C compared to May. It’s a steady escalation, not a one-day leap.
How hot will it get?
Though the solstice signals the start of summer, the intensity of heat continues to build well into July and August. In Abu Dhabi and Dubai, daily highs in late June commonly reach between 47°C and 49°C, with peak temperatures in desert areas spiking up to 50°C last year.
But temperature alone doesn’t tell the full story. Humidity plays a major role in how the heat is felt. Coastal cities experience high humidity levels in June, which raises the heat index – a measure of how hot it really feels when relative humidity is factored in with actual air temperature.
This happens because moisture in the air limits sweat evaporation, the body’s natural cooling mechanism. If the wind is coming from the sea, it brings more humidity; if it comes from inland deserts, the air is typically drier. Either way, June brings discomfort, particularly in the evenings when humidity peaks and the breeze offers little relief.
When does summer end in the UAE?
According to current astronomical calculations, summer in the UAE lasts until Monday, September 22. This is the date of the autumnal equinox, when day and night are roughly equal in length, and the sun crosses the celestial equator moving southward.
Until then, the Emirates will experience long, bright, and intensely hot days. While some residents escape to cooler destinations using expanded summer flight schedules from Emirates and flydubai, most people adapt by shifting daily routines, flocking to indoor attractions, and staying hydrated.
From bustling malls and night markets to early-morning workouts and post-sunset walks, summer life in the UAE takes on a distinctive rhythm. It’s a season defined not just by heat, but by how people respond to it – through culture, creativity, and a serious appreciation for air conditioning.
Whether you're watching the thermostat creep toward 50°C or counting down the days until autumn, there's no denying it now: summer officially begins on June 21. Let the sunniest stretch of the year begin.