The seasonal anomaly of the global average surface temperature in Winter (December to February) 2017 (i.e. the average of the near-surface air temperature over land and the SST) was +0.40°C above the 1981-2010 average (+0.79°C above the 20th century average), and was the 2nd warmest since 1892. On a longer time scale, global average surface temperatures have risen at a rate of about 0.77°C per century.
1st. 2016(+0.60°C), 2nd. 2017(+0.40°C), 3rd. 1998(+0.31°C), 4th. 2015(+0.29°C), 5th. 2007(+0.25°C)