August 2026 joint hottest month on record: Copernicus
The Copernicus Climate Change Service (C3S) reported that August 2026 tied with July 2023 as the hottest month globally on record, with a global average surface air temperature of 16.96°C — 0.85°C above the 1991–2020 average and 1.65°C above the pre-industrial (1850–1900) baseline
It was the first month since November 2025 in which the global monthly average temperature exceeded the Paris Agreement's 1.5°C threshold
Average sea surface temperature outside polar regions reached a record 21.07°C for August, surpassing the previous August record of 20.98°C set in 2023, and tying March 2024 as the warmest month on record for oceans
The June–August 2026 period was the warmest summer on record for Western Europe, surpassing the previous record set in 2003, accompanied by severe drought, wildfires, and exceptionally low river flows across France, the UK, Hungary, Romania, and Serbia
C3S attributed the extreme warmth to the combined effect of greenhouse gas warming from fossil fuel combustion and strong El Niño conditions in the equatorial Pacific Ocean
Copernicus Climate Change Service (C3S) and Global Temperature Monitoring
C3S is one of six thematic services of the European Union's Copernicus Earth observation programme, providing authoritative, science-based information on the past, present, and future climate. It maintains one of the world's principal global surface temperature reanalysis datasets (ERA5), widely cited alongside NASA GISS, NOAA, and the UK Met Office/Hadley Centre as an authoritative record of global temperature.
Key Details
- Copernicus is implemented by the European Centre for Medium-Range Weather Forecasts (ECMWF) on behalf of the European Commission
- C3S uses the ERA5 reanalysis dataset, combining billions of observations (satellite, surface stations, balloons, ships) with model-based reconstruction
- Its temperature baseline for "pre-industrial levels" is 1850–1900, matching the reference period used in IPCC assessment reports and the Paris Agreement
The 1.65°C anomaly figure cited for August 2026 is measured against this same pre-industrial baseline, making it directly comparable to the Paris Agreement's long-term temperature goal.
Paris Agreement 1.5°C/2°C Temperature Goal
The Paris Agreement (2015, adopted at COP21, in force from 2016) commits parties to holding the increase in global average temperature to "well below 2°C above pre-industrial levels" and pursuing efforts to limit the increase to 1.5°C. It is important to distinguish a single hot month or year exceeding 1.5°C (a short-term anomaly) from the Agreement's actual target, which refers to a sustained, multi-decadal average temperature rise.
Key Details
- Adopted at COP21 (Paris, December 2015); entered into force November 2016; ratified by India in October 2016
- The 1.5°C reference draws on the IPCC's 2018 Special Report on Global Warming of 1.5°C, which detailed the sharply worse impacts of 2°C versus 1.5°C warming
- India's Nationally Determined Contribution (updated August 2022) commits to a 45% reduction in emissions intensity of GDP by 2030 (from 2005 levels) and 50% cumulative electric power installed capacity from non-fossil fuel sources by 2030
- A single month or year crossing 1.5°C does not mean the Paris Agreement's threshold has been formally breached, since that is assessed as a long-term average, not a single-month anomaly
August 2026 breaching 1.5°C for the first time since November 2025 is a symptomatically significant single-month event, but distinguishing this from a permanent breach of the Paris Agreement's long-term goal is a common source of confusion tested in current-affairs-linked Mains answers on climate governance.
El Niño–Southern Oscillation (ENSO) and Global Temperature Anomalies
ENSO is a recurring climate pattern involving fluctuations in ocean surface temperature and atmospheric pressure across the equatorial Pacific, cycling between warm (El Niño) and cool (La Niña) phases roughly every two to seven years. El Niño years are typically associated with elevated global average surface temperatures, amplifying the underlying warming trend from greenhouse gas emissions.
Key Details
- El Niño is characterised by anomalously warm sea-surface temperatures in the central and eastern equatorial Pacific, weakening trade winds and altering global rainfall/monsoon patterns
- In India, El Niño years are historically associated with weaker/deficient southwest monsoon rainfall, though the correlation is not absolute (monitored via the Indian Ocean Dipole (IOD) as a counteracting factor)
- The India Meteorological Department (IMD) and the World Meteorological Organization (WMO) jointly track ENSO status through Sea Surface Temperature (SST) anomalies in the Niño 3.4 region
C3S attributes August 2026's record heat to the combination of a strong El Niño event with the long-term greenhouse-gas-driven warming trend — a standard two-factor explanation (natural variability plus anthropogenic forcing) used to interpret single-month temperature records.
- August 2026 global average surface temperature: 16.96°C (0.85°C above 1991–2020 average; 1.65°C above 1850–1900 pre-industrial baseline)
- Tied with July 2023 as the hottest month on record globally
- First month since November 2025 to exceed the 1.5°C threshold above pre-industrial levels
- Average non-polar sea surface temperature: 21.07°C — a new August record, above the 2023 record of 20.98°C
- June–August 2026: warmest summer on record for Western Europe, surpassing the 2003 record
- Attributed causes: greenhouse gas warming from fossil fuel combustion + strong El Niño conditions in the equatorial Pacific
- Paris Agreement (2015/2016): "well below 2°C," pursuing efforts to limit warming to 1.5°C above pre-industrial levels
- India's NDC (2022 update): 45% emissions intensity reduction by 2030 (from 2005 levels); 50% non-fossil power capacity by 2030