The HadCRUT4.5 temperature anomaly for September calculated by spherical triangulation is 0.54C, a fall of 0.17C since August. Temperatures have seemingly returned to a long trend after the 2016 El Nino.
The temperature distribution in the Northern Hemisphere for September is shown below. All temperatures are relative to a 30 year norm from 1961-1990.
and for the Southern Hemisphere
which shows a La Nina type pattern.