The global land and ocean surface temperature for December 2020 was 0.78°C (1.40°F) above the 20th century average and the eighth highest departure from average for December in the 1880–2020 record. Compared to recent months, this value was the smallest monthly temperature departure during 2020 and the smallest monthly temperature departure since February 2018.
However, compared to all Decembers, this was the seventh highest December percentage since records began in 1951. Meanwhile, the most notable cooler-than-average conditions were present across parts of southern Asia, where temperatures were at least 2.0°C (3.6°F) below average. Other notable cooler-than-average conditions were present across the tropical Pacific Ocean, where La Niña was present during December 2020. However, no land or ocean areas had record-cold December temperatures.
The time series data is available in the box on the top center of the page under Temperature Anomalies Time Series.