Figures from Nasa show that for the seventh month in a row, global temperatures were broken, with the largest ever margin demonstrated in April.
This is the third time in as many months that the monthly record was broken by the largest margin ever.
With February and March showing greater departures from the norm, April followed suit trouncing the previous record by 0.24C.
Describing the findings, Christina Figueres, executive secretary of the UN Framework Convention on Climate Change said: "The very unfortunate circumstance we have now is the overlap of a very intense El Nino that has been magnified by climate change."
"All these record breaking temperatures and attendant implications that we have had, such as record breaking fires for example, and droughts in India are all reminders that we cannot afford to do anything except accelerate the solution agenda - we absolutely have no other option but to accelerate."
In a patter repeated in previous months, several northerly regions, including the US state of Alaska, saw very hot temperatures during April.
The records for April will also raise questions about the achievability of a goal to hold global warming to 1.5C that was agreed at the Paris climate talks in December 2015.