The Moyhu NCEP/NCAR index fell from 0.48°C in November to 0.391°C (June was 0.369°C). It was an up and down month, cool in the mid, but warm at the end.
I don't normally talk about long term records with reanalysis, because I don't think it is homogeneous enough. But I will note that successive annual averages for the last three years were 0.19, 0.33, and 0.531°C (anomaly base 1994-2013). So up by 0.2°C in 2016. This is an indicator of large margins in other indices. It also means that all months in 2016 were warmer than the 2015 average, including December. El Nino has gone, but it stayed warm.
A feature was again a band of cold from Cairo to Vladivistok through Russia, though most of Asia was warm. Also cold in Canada and north US, though not in the South. Warm in the Arctic - a pattern for the December quarter.
Sea ice in the Arctic became more normal, and the very fast melting in the Antarctic slowed, although still a lot less ice than in other years.