GISS is down from 0.90°C in September to 0.89°C in October. As with the similar small drop in TempLS mesh, the main news is that for the first time in a year, it didn't set a record for the month (because Oct 2015 was so warm). As many have remarked, it fits with the near certainty of a record hot 2016.
Other indices were down; NCEP/NCAR by 0.056°C. As often recently, polar variations played a big part; both poles were quite warm, and GISS and TempLS mesh respond to this. I expect NOAA and HADCRUT will show larger reductions.
I'll show the map comparisons below the fold. The updated comparison plots with 1998 are here
Here is the GISS map for the month
The Moyhu spherical harmonics map is here:
Basically the same features, though GISS shows more emphatic warming in the Arctic.