Quriyat, Oman – world’s hottest low temperature ever recorded: 42.6 Celsius

You may think it’s been hot where you are, but the coastal city of Quriyat (Qurayyat) in Oman established a singularly unenviable heat mark on Tuesday – June 26, 2018: a 24-hour low temperature of 42.6°C (108.7°F), including the period from local midnight to midnight.

According to weather records expert Maximiliano Herrera, this sets a new world record for the hottest 24-hour-minimum temperature ever recorded. Herrera says that the previous high-minimum temperature record for any 24-hour period was 41.9°C (107.4°F), set at nearby Khassab Airport in Oman on June 27, 2011. That location also holds the world record for the highest overnight (12-hour) high-minimum temperature: 44.2°C (111.6°F) on June 17, 2017. (Note that the World Meteorological Organization does not maintain world record statistics for highest minimum temperature).

Over a period of 24 hours, the temperature in the coastal city of Quriyat, Oman, never dropped below 108.7 degrees (42.6 Celsius) Tuesday, most likely the highest minimum temperature ever observed on Earth.

For a location to remain no lower than 109 degrees around the clock is mind-boggling. In many locations, a temperature of 109 degrees even during the heat of the afternoon would be unprecedented.

Quriyat’s suffocating low temperature, first reported by Jeff Masters at Weather Underground, breaks the world’s previous hottest minimum temperature of 41.9 Celsius, also set in Oman, on June 27, 2011.

Masters received word of the exceptional temperature from weather records expert Maximiliano Herrera. Incredibly, the temperature in Quriyat, Masters said, remained above 107.4 degrees (41.9 Celsius) for 51 straight hours. Its blistering afternoon high temperature of 121.6 degrees (49.8 Celsius) Tuesday was just about two degrees shy of Oman’s all-time heat record and its highest June temperature, Masters reported.

Quriyat, sometimes also spelled Qurayyat, is a small fishing village in northeast Oman adjacent to the Sea of Oman that spills into the Arabian Sea. The city’s population is just over 50,000, and it is about an hour southeast of Muscat, Oman’s capital.

Tuesday’s record-breaking heat resulted from a strong high-altitude, high-pressure system or heat dome anchored over the region, which pumped air temperatures up to 15 degrees above normal. Masters said sea surface temperatures in the adjacent waters were about 90 degrees, keeping air temperatures elevated even through the night and offering no reprieve from the oppressive conditions.

Tuesday’s 109-degree low, while the highest known, is not official and remains unverified. Although the World Meteorological Organization validates and maintains records for the hottest maximum world temperature, it does not do so for minimum temperatures.