March 2026 Ranks Fourth Warmest Ever at 1.48 Degrees Above Pre-Industrial Levels

Global average temperatures in March 2026 were 1.48 degrees Celsius above the 1850-1900 pre-industrial baseline, making it the fourth-warmest March on record, according to the Copernicus Climate Change Service. Sea surface temperatures were the second warmest ever recorded, raising concerns about a potential transition toward El Nino conditions.

The Copernicus Climate Change Service reported that March 2026 ranked as the fourth-warmest March in the observational record, continuing a sustained pattern of above-normal global temperatures. Sea surface temperatures were particularly notable, reaching the second-highest levels ever recorded for the month when land and ocean measurements were combined. Scientists at C3S noted that the elevated ocean temperatures could be an indicator of emerging El Nino conditions forming in the Pacific.

El Nino events, which involve warming of surface waters across the central and eastern tropical Pacific Ocean, have far-reaching effects on global weather patterns. For India, El Nino conditions are historically associated with weakened monsoon rainfall, increasing the risk of drought across agricultural regions and affecting hydropower generation. The current warming signal in ocean temperatures comes as the world has already experienced more than a decade of record or near-record annual temperatures.

Meteorological agencies will continue monitoring Pacific Ocean conditions in the months ahead to determine whether a full El Nino develops and its potential intensity. If a transition occurs, it would have immediate implications for India's June-September monsoon forecast, crop planning, and water resource management. The C3S data adds to a growing body of evidence that the climate system is operating at elevated temperatures even during months that would once have been considered anomalously warm.

Key figure — 1.48 degrees Celsius above pre-industrial average — March 2026 temperature anomaly