Despite la-Nina November 2017 was +0.87 degrees Celsius warmer than the mean November temperature from 1951-1980

Despite the El Niño 

Another temperature record set in November

November 2017 was +0.87 degrees Celsius warmer than the mean November temperature from 1951-1980, an insignificant 0.03°C cooler than November 2016 (+0.90°C). The warmest month of November according to the analysis happened in 2015 (+1.03°C) due to a strong El Niño. The last three Novembers — 2015, 2016, and 2017 — are the three warmest in the entire modern record.

From: https://data.giss.nasa.gov/gistemp/news/20171218