The monthly anomaly of the global average surface temperature in March 2016 (i.e. the average of the near-surface air temperature over land and the SST) was +0.64°C above the 1981-2010 average (+1.09°C above the 20th century average), and was the warmest since 1891. On a longer time scale, global average surface temperatures have risen at a rate of about 0.85°C per century.
1st. 2016 (+0.64°C), 2nd. 2015 (+0.31°C), 3rd. 2010 (+0.28°C), 4th. 2002 (+0.26°C), 5th. 1990 (+0.25°C)