UAE marks start of summer with solstice and soaring heat
Humid nights and fog forecast across coastal and internal areas
DUBAI: Summer has officially arrived in the United Arab Emirates (UAE) as today, June 21, marks the summer solstice – the longest day of the year.
The solstice occurred at precisely 6:42am UAE time, when the sun reached its highest point in the sky above the Northern Hemisphere, triggering the onset of the Emirates’ hottest and brightest season.
This astronomical milestone signifies the moment the sun stands directly over the Tropic of Cancer at 23.37° North, the latitude closest to the UAE. It’s a celestial event that brings not just symbolic importance but tangible impacts, especially as residents prepare for months of scorching temperatures and intense humidity.
Heat and humidity
According to the National Center of Meteorology (NCM), the UAE will continue to experience hot days and humid nights. Today’s high temperatures are forecast to reach between 37°C and 43°C, with lows hovering between 25°C and 30°C – consistent with the sweltering trend observed in recent weeks.
Humidity levels will rise particularly during the night and early morning hours, with a probability of fog or mist formation over coastal and internal areas, especially on Sunday morning. These humid conditions, combined with soaring temperatures, will increase the ‘heat index’ – the real-feel temperature experienced by the body.
In many parts of the UAE, especially along the coastline, the moisture-laden breeze coming in from the sea amplifies the discomfort. Winds from the southeast or southwest, typically drier, offer marginal relief, but during summer, even these feel warm against the skin.
Lengthening days
The arrival of the solstice also means the UAE will now experience its longest daylight hours of the year. Compared to May, daylight stretches longer into the evening, allowing more time for the sun to heat buildings, roads, and urban surfaces. This cumulative exposure leads to the 'urban heat island' effect, where temperatures remain high even after sunset due to stored heat being slowly released back into the atmosphere.
This extended exposure to solar radiation increases the body’s thermal load and challenges its natural cooling mechanisms. With sweat evaporation hampered by high humidity, residents are urged to stay hydrated and avoid outdoor activities during peak hours.
Summer solstice in UAE
June temperatures in the UAE typically climb between 47°C and 49°C, with desert interiors sometimes recording highs near 50°C. The solstice marks the start of a gradual increase in daily maximums, not a sudden jump. Weather experts anticipate that the true heat peaks will arrive in July and persist through August.
While the summer solstice may mark the official beginning of summer, it’s the months that follow that are the most intense. In 2023, some desert regions saw thermometer readings hitting the 50°C mark, and similar patterns are expected again this year.
Humidity continues to be the defining discomfort, particularly in coastal cities like Dubai and Abu Dhabi. The combination of heat and moisture places greater stress on the human body, making it feel significantly hotter than the actual air temperature.
Summer lifestyle shifts
Summer in the UAE reshapes daily life. Residents adapt their routines, opting for early morning or post-sunset outdoor activities. From 24-hour shopping malls to night markets and fully air-conditioned fitness centres, life shifts indoors. Tourism trends also show many residents opting for overseas getaways, taking advantage of expanded summer flight schedules from airlines like Emirates and flydubai.
According to astronomical calculations, the season will last until Monday, September 22 – the date of the autumnal equinox, when daylight and night are nearly equal. Until then, the UAE is set for prolonged sun, intensified heat, and elevated humidity.