When six independent scientific teams, using different instruments and different methods, all conclude the same year was the hottest on record, that agreement is not a coincidence. 

It is the strongest possible sign the measurement is sound.

TL;DR

• 2024 was confirmed as the warmest year on record and the first calendar year with a global average temperature more than 1.5°C above pre-industrial levels.
• Six independent datasets, from NASA, NOAA, the UK Met Office, Berkeley Earth, Copernicus, and the Japan Meteorological Agency, all agree that 2024 was the warmest year since records began.
• The small differences between them come mostly from how each defines the pre-industrial baseline, not from disagreement about the trend.

The temperature figures here come from the world’s major climate-monitoring bodies, which coordinated the release of their 2024 data.

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Independent teams, one answer

The datasets place 2024 between roughly 1.51°C and 1.6°C above the 1850 to 1900 baseline, using slightly different reference periods and methods. 

The spread is a few tenths of a degree, and every dataset agrees on the ranking and the trajectory.

Tiny differences exist, but they don’t matter

The gaps come down to method: how each team fills in sparse regions like the poles, and exactly which years they call “pre-industrial.” 

All of the internationally produced datasets show 2024 was the hottest year since records began in 1850. 

The disagreement is at the edge of the last decimal, while the agreement is total on what counts: the planet is warming, fast.

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ELI5

Several different science teams around the world measure how hot the planet is, each in their own way. 

They all found that 2024 was the hottest year ever recorded. 

When everyone measures separately and gets the same answer, you can be confident the answer is right.

Sources

Copernicus | Carbon Brief | WMO