Line graph time series of global mean surface air temperature anomalies for every October from 1891 through 2023. There is a long-term warming trend. A 5-year running mean and long-term linear trend are also displayed on this graph. Anomalies are computed relative to a 1991 to 2020 baseline.
https://fediscience.org/system/media_attachments/files/111/410/554/466/853/290/original/147ce5d7f89524d2.png