UAE Experiences Notable Shift To Cooler Temperatures And Increased Humidity In December

December in the UAE signifies a shift from autumn to winter, marked by cooler temperatures and increased humidity. The National Centre of Meteorology (NCM) highlights that temperatures typically drop significantly after December 23, aligning with the winter solstice. This period sees a decline in both maximum and minimum temperatures by 3 to 6 degrees Celsius compared to November.

The UAE experiences cooler weather due to a strengthening high-pressure system from the north. This system brings northwesterly winds that lower nighttime temperatures, especially in inland and mountainous areas. Additionally, upper-level westerly troughs contribute to cloud formation and potential rainfall, sometimes accompanied by thunder.

Average daytime temperatures range from 21.7°C to 27.4°C, while nighttime lows fall between 12.9°C and 17.4°C. Historically, extreme temperatures have been recorded, such as a high of 37°C in Sweihan in 2016 and a low of –0.7°C at Jabal Jais in 2004.

Humidity levels rise during December, with mean values around 63%. Maximum humidity can reach between 79% and 90%, while minimum levels range from 32% to 49%. The increase in humidity is due to moist air masses moving from the Arabian Gulf towards the UAE, creating conditions conducive for fog and mist formation.

Fog becomes more prevalent during this month, with the highest occurrence recorded in 2014 when there were 20 fog days and five mist days. These conditions are typical as the country transitions into its winter climate.

Rainfall and Wind Conditions

Rainfall remains sporadic but can be intense at times. A notable instance was in Dhudna in 2006 when December saw a record rainfall of 208.4 mm. Winds are generally light to moderate, averaging around 11 km/h; however, strong gusts can occur, with the highest recorded gust reaching 87 km/h at Makassib in 2019.

The overall climate summary for December indicates cooler temperatures, higher humidity levels, increased fog formation, and occasional rainfall as the UAE enters its winter season.

With inputs from WAM