The UAH data is out for the lower troposphere for December. For three months in a row, the lower troposphere has had the hottest months - the hottest October, the hottest November and the hottest December in the record (since 1979). September 2015 was the sixth hottest on record, the warmest being 1998.
Below is the ENSO chart showing the UAH lower troposphere temperatures (air temperature via satellite) for the El Niño years of 1997/98, 2009/10 and 2015/16 (to date). As with RSS, the temperature in the lower troposphere for December went up, unlike in 2009/10 when it dipped.
|Data source: UAH and Roy Spencer's blog.|
Given the El Niño, the chances are that the temperature will keep rising over the next two months at least, and could go much higher than it is now. (As you would have guessed, deniers are already arguing along the lines that it hasn't warmed since 2017, and we're heading for cold - any year now.)