The monthly anomaly of the global average surface temperature in October 2015 (i.e. the average of the near-surface air temperature over land and the SST) was +0.53°C above the 1981-2010 average (+0.86°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 0.64°C per century.
1st. 2015(+0.53°C), 2nd. 2014(+0.34°C), 3rd. 2003(+0.24°C), 4th. 2006(+0.23°C), 5th. 2012(+0.22°C)