This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionExtrapolated global average temperature 1942-2100.png
English: Global monthly temperature data for 1942-2025 was averaged for each year and an exponential smoothing forecasting model was used to extrapolate far beyond the data to the year 2100. The use of a large horizon is highly speculative.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
Captions
Global temperature in degrees Celsius 1942-2025 from Our World In Data forecasted to 2100.