Monthly surface temperature anomalies by decade, World

Average decadal difference between a month's average surface temperature from the mean temperature of thesame month during the period 1991-2020, in degrees Celsius.

112246810-1 °C2020s

Data source: Contains modified Copernicus Climate Change Service information (2025)Learn more about this data

Note: The numbers 1 to 12 on the horizontal axis represent the months of the year, from 1 for January to 12 for December. Note that thedecadal average for 2020, comprising fewer than the typical 10 data points, may introduce greater uncertainty compared to otherdecades.

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Monthly surface temperature anomalies by decade

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