Last month has been the warmest May since the record-breaking May 2008, Ronaldsway Met Office has announced.
The temperature exceeded 20 degrees on five days, with both May 9 and May 12 seeing a maximum of 22 degrees.
Clear skies meant some chilly nights with a ground frost on four occasions, the lowest temperature on the grass being minus 1.2 degrees on May 15.
The Met Office statement went on to say it was a dry month with only 30.9mm of rain, around 40 per cent below normal.
There were 241 hours of bright sunshine recorded, compared to the long-term mean of 225 hours.
The last two days of the month were the sunniest with 15.3 hours each.
The mean wind speed measured 13.4 miles per hour, slightly above the May mean of 12.1 miles per hour.
The highest gusts of 40 miles per hour were recorded on May 1 and May 2.
There were three days with fog, a small hail shower on May 2 but no thunderstorms were observed.