It guarantees a record year for HadSST3 -- December's anomaly has only to be above -0.29°C. November's anomaly was 0.48°C, which is the same as the year-to-date average. Easy peasy.
And there's no hundredths-of-a-degree wiggle room with this one -- if December's anomaly is just the year-to-date average, 0.48°C, it will easily beat the second-warmest year, 1998, by
It's the warmest 5 years (60 months) in the record, the warmest 10 years, and the warmest 30 years.
It's just warm no matter how you look at it. Record warmth.
PS: Notice the Hadley Centre now gives "Unadjusted SST data" (near bottom of their download page), with the caveat "Bear in mind that the unadjusted SST anomalies contain significant uncompensated biases and should not be used for climate trend analyses." A good idea, nicely worded.