"Mean Monthly Temperature Records Across the Globe". National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA). Link is an example for one month; for other months, change the "202501" in the preceding URL to yyyymm, where yyyy is the four-digit year and mm is the two-digit month (01=January through 12=December)
.●Source for 1850- raw data: "Global Land and Ocean Temperature Anomalies". National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA). Archived from the original on 26 March 2026.
●Updated data is accessible through Climate at a Glance Global Time Series / Globe / Global Time Series. Choose parameters: Surface: Land and Ocean / Parameter: Average Temperature Anomaly / Time Scale: 1-Month / Month: All Months / Start Year: 1850 / End Year: 20__.
●Technical note: data in chart is adjusted to reference period of 1850-1900 (representing pre-industrial era)
.●Source for 1850- raw data: "Global Land and Ocean Temperature Anomalies". National Centers for Environmental Information (NCEI) of the National Oceanic and Atmospheric Administration (NOAA). Archived from the original on 26 March 2026.
●Updated data is accessible through Climate at a Glance Global Time Series / Globe / Global Time Series. Choose parameters: Surface: Land and Ocean / Parameter: Average Temperature Anomaly / Time Scale: 1-Month / Month: All Months / Start Year: 1850 / End Year: 20__.
●Technical note: data in chart is adjusted to reference period of 1850-1900 (representing pre-industrial era)
