+34.6°C in Mongolia in September!

Mongolia has joined the list of Asian nations experiencing unprecedented September heat, with temperatures reaching astonishing values far beyond what is considered normal for this time of year. On September 2, 2025, both Khanbogd and Khovsgol reported a searing 34.6°C.

In a nation renowned for its harsh winters and wide annual temperature range, such late-season heat is nothing short of extraordinary. The Mongolian Plateau, normally beginning to cool rapidly by early September, instead found itself under the grip of a powerful high-pressure ridge that allowed heat to build to near midsummer intensity. These 34.6°C readings are comparable to peak July temperatures, not what would be expected at the onset of autumn in the heart of Inner Asia.

The scale of this event is historic, as September temperatures above 34°C are virtually unheard of in Mongolia’s climate records. Traditionally, maximums at this time of year would be closer to the mid-20s °C, with nights often dropping into the single digits. Instead, Khanbogd and Khovsgol witnessed scorching afternoon highs, pushing health systems and agricultural activities under unusual stress.

This heat anomaly is part of a broader regional extreme heat event across Asia, with Japan, South Korea, and now Mongolia all reporting record-shattering September temperatures. The interconnected pattern points to a blocking ridge and abnormally warm continental conditions, signaling a shift in climate dynamics that makes even traditionally cooler regions vulnerable to late-season extremes.

In summary, Mongolia has set a new benchmark for September heat, with 34.6°C recorded at Khanbogd and Khovsgol.

Illustration picture: https://mongolia-guide.com/destination/umnugobi/khanbogd