RESEARCH

2024 Was Earth's Hottest Year on Record — Five Independent Agencies Confirm First Breach of the 1.5°C Threshold

Environment · 2026-06-08 10:07

Every major independent climate monitoring agency — NASA, NOAA, the EU's Copernicus Climate Change Service, WMO, and Berkeley Earth — confirmed 2024 as the hottest year since observations began, all publishing their findings as primary headline results. Global average surface temperature was approximately 1.46°C–1.60°C above pre-industrial levels depending on each agency's baseline period; the spread reflects different reference windows, not scientific disagreement. WMO's consolidated analysis of six datasets placed the anomaly at 1.55°C (±0.13°C). 2024 was the first calendar year on record to cross the 1.5°C threshold established by the Paris Agreement as a long-term climate guardrail.

Findings

All five major independent climate monitoring agencies — NASA GISS, NOAA, Copernicus, WMO, and Berkeley Earth — confirmed 2024 as the hottest year in recorded history, each publishing the finding as their primary annual headline.
Global average surface temperature in 2024 was approximately 1.46°C–1.60°C above pre-industrial levels across the five datasets; the variation reflects different baseline periods (1850–1900 vs. 1880–1920), not disagreement on the outcome.
2024 was the first calendar year in the observational record to exceed the Paris Agreement's 1.5°C threshold, confirmed by Copernicus (1.60°C) and WMO (1.55°C ± 0.13°C).
The 2024 anomaly broke the previous record set in 2023 by approximately 0.08°C–0.10°C depending on the dataset — a statistically significant jump that surprised several research teams.
WMO's State of the Global Climate 2024 report noted concurrent records in ocean heat content, global sea-level rise, and Arctic sea-ice extent — making 2024 a multi-system record year, not merely a surface temperature outlier.

Delta Engine result

✓ Consensus — Δ 0.0421 (threshold 0.05)

Evidence quality

avg 93 · min 85 · max 95 · spread 10