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It was an unusually warm December last year that had dipped below 2 F (1.11 C). And it was a January month whose average temperature went above 2 F (1.13 C), making it hotter than average, reports Climate Central.

Hence, this is the fourth straight month in which temperatures have gone up above average at 1.8 F (1 C).

This comes on the heels of 2015 being the world's hottest year on record, breaking the previous record set in 2014 by 0.23 F (0.13 C),

Last year had also been the hottest till then, as it broke even the previous year's record by .23 F (0.13 C). While the El Niño event can usher in warmer temperatures, it raised the global temperature about 0.2 C, which made it much lower than the 1.11 C heat jump experienced by January.

This has worried all the experts.

"The record is helped along a bit by El Niño, but most of it - more than 80 percent - is due to human-caused global warming," said Stefan Rahmstorf, a researcher from Germany's Potsdam Institute of Climate Impact Research, reported The Sydney Morning Herald.

NASA's data collected displays January being abnormally warm since documentation started 136 years ago. The map shows most of the planet marked in red indicating warmth, so that there are fewer places where it was not unusually warm. In the Arctic, some parts rose by 23 F, much warmer than normal for January, according to NASA.

With excessive heat, the Arctic sea ice dropped to a deep low, to an extent of 42,5000 square miles much below the earlier record. Most of the ice here was equal to the collective regions of Texas, New Mexico, Maryland and New Hampshire.

This month's warmth continues to rise, and is expected to break all records, according to the U.K. Met Office on weather and climate change.