Temperature anomalies over the last month (left), 3 months (center), and 12 months (right) across the Northern Hemisphere. The largest anomaly (by magnitude) was along the Arctic Ocean coast in Siberia.
Data from CopernicusECMWF (npub13av…8hhw) ERA5 reanalysis at https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview