UAE to Experience Longest Day of the Year on June 20
Marking the Longest Day of the Year with Unique Astronomical and Weather Phenomena

UAE to Experience Earliest Summer Solstice on June 20
Abu Dhabi: The UAE will experience an early summer solstice this year, occurring on June 20th at 20:51 UTC. This marks the earliest solstice since 1796 for most countries around the world. The summer solstice is a significant astronomical event that marks the beginning of summer in the Northern Hemisphere. It occurs when the Earth’s axial tilt is closest to the sun, resulting in the longest day and the shortest night of the year. For the UAE, this celestial event will usher in the longest day of the year, with daylight hours reaching 13 hours and 48 minutes. It’s important to note that similar variations in solstice timing can be expected in future leap years.
Ibrahim Al Jarwan, Board Chairman of the Emirates Astronomical Society and member of the Arab Union for Space and Astronomy Sciences, explained that during the summer solstice, the sun is directly overhead at the Tropic of Cancer, its northernmost point. This alignment means that areas directly below the sun, such as the southern regions of the UAE, will experience a unique phenomenon where there will be no shadow at noon. Shadows at noontime will also be shorter across the Arabian Peninsula, with the shortest shadow occurring in the entire Northern Hemisphere.
This phenomenon of having no shadow at noon in the southern regions of the UAE is particularly interesting. It occurs because the sun is positioned directly overhead, minimizing the angle at which sunlight strikes the ground. This effect is most pronounced at the Tropic of Cancer, but its influence can be observed across the Arabian Peninsula. The disappearance of shadows at noon is a clear indication of the sun’s position and highlights the intensity of solar radiation during the solstice.
As the solstice heralds the onset of summer, the UAE will experience a noticeable rise in temperatures. Al Jarwan added that temperatures are expected to range between 41 and 43 degrees Celsius during the day and 26 and 29 degrees Celsius at night, with generally dry conditions and active winds. These temperatures, combined with dry conditions and active winds, will define the first half of the summer season, which runs from June 21 to August 10. The high daytime temperatures will make for sweltering conditions, while nighttime temperatures will remain relatively high, contributing to the overall heat experienced during this period.
The weather patterns during the first half of summer are influenced by the increased solar radiation and the geographical location of the UAE. The dry conditions are a result of limited moisture in the atmosphere, which is typical for the region during this time of year. Active winds will also play a role in shaping the weather, potentially providing some relief from the heat but also contributing to the dryness of the air.
Moving into the second half of summer, spanning from August 11 to the autumnal equinox on September 23, the UAE will see a shift in weather patterns. This period is characterized by an influx of high humidity, persistent high temperatures, and the activation of moist Kos winds. These winds will invigorate the formation of cumulonimbus clouds over mountainous regions and their surroundings, leading to thunderstorms. The development of these clouds often leads to thunderstorms, adding a dynamic element to the summer weather.
The increase in humidity during the second half of summer can be attributed to the changing atmospheric conditions and the influence of the surrounding bodies of water. The Persian Gulf and the Arabian Sea play a crucial role in modulating the region’s climate, contributing to the higher humidity levels experienced during this period. The activation of moist Kos winds is another significant factor that brings moisture from the sea, leading to cloud formation and the potential for thunderstorms.
The presence of cumulonimbus clouds and the associated thunderstorms have significant implications for the region. These weather phenomena can provide much-needed relief from the heat and dryness, but they also bring the risk of heavy rainfall and potentially severe weather conditions. Thunderstorms can lead to localized flooding, especially in areas with poor drainage systems, and can disrupt daily activities and travel plans.
The summer solstice and its associated weather patterns have significant implications for daily life in the UAE. The extended daylight hours and high temperatures will impact various aspects of life, from daily activities to energy consumption. The need for effective cooling solutions and hydration will become paramount as residents cope with the intense heat. Understanding these patterns will help residents prepare for the challenges and opportunities that the summer season brings.
During the summer solstice, the UAE will also witness a range of environmental and ecological impacts. The intense solar radiation can affect vegetation and wildlife, particularly in arid regions. Plants and animals adapted to the harsh desert climate will face additional stress due to the extreme temperatures and dry conditions. Water resources will also be under increased pressure, highlighting the importance of sustainable water management practices.
For the energy sector, the summer solstice marks a period of peak demand for electricity, driven by the increased use of air conditioning and cooling systems. Managing this demand will be crucial to ensure a stable and reliable power supply. Renewable energy sources, such as solar power, will play an essential role in meeting the increased energy needs during this time.
The early summer solstice on June 20th marks the beginning of an intense summer season for the UAE. With the longest day of the year and noontime shadows disappearing in some regions, the country will experience significant changes in daylight and temperature patterns. The first half of summer will be characterized by dry, hot conditions, while the second half will see increased humidity and the potential for thunderstorms. Understanding these patterns will help residents prepare for the challenges and opportunities that the summer season brings, ensuring they can navigate the intense heat and dynamic weather conditions effectively.



