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.

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