Second Hottest September on Record; El Niño to Accelerate Warming

September 2026 was the second hottest on record, with global average temperatures exceeding 1.5°C above pre-industrial levels for the second consecutive month. The ongoing El Niño is expected to further accelerate warming through 2026 and into 2027, raising concerns about climate impacts. The report is based on preliminary data from OKO.press, and the exact magnitude of future warming remains uncertain.