Temperature change

How much warmer a year was than the 1991 to 2020 average, country by country.

The temperature anomaly is the difference between a year's average temperature over a country's land and the average of 1991 to 2020, in degrees Celsius. A positive value means a warmer year than that baseline. The figures come from ERA5, the Copernicus Climate Change Service's reanalysis, which blends weather observations with a climate model to cover the whole globe since 1940; Our World in Data averages it by country. Single years swing with the weather, so look at the trend.

World map · Temperature anomaly

Year

Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data (updated 2026-10-12) · fetched 29 Oct 2026

Over time · Temperature anomaly

Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data (updated 2026-10-12) · fetched 29 Oct 2026

Years

Show the numbers

All countries · Temperature anomaly

Continent Year

Source: Contains modified Copernicus Climate Change Service information (2026) – with major processing by Our World in Data (updated 2026-10-12) · fetched 29 Oct 2026

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Every country and year, with the source on each row.

About the author

Hello there, I’m Klaus Jürgen Folz. I studied Mechanical Engineering at the Federal University of Rio Grande do Sul (UFRGS) in Brazil, and I work in Austria as a lead Python and Power BI developer. I built Data Mechanics because good decisions start with facts. Public data is often scattered, hard to find or locked behind paywalls, and too much of what we read about the world is biased. Here, every number is shown as it was published, next to its source, so anyone can check it, compare countries and leaders, and draw their own conclusions.

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