The island has endured its coldest spring since 1979.
The mean temperature for the months of March, April and May measured only 7.0°C, compared with the long term mean of 8.3°C.
It was also the windiest spring ever recorded. The wind speed for the months of spring averaged 16.4mph, beating the previous spring record of 16.1mph set in 1994.
The mean temperature for May measured 10.0°C, almost 1°C below the long-term mean, making it the coldest May since 1996.
There were five nights with a ground frost. On May 2 the ground temperature fell to minus 4.4°C, the lowest recorded in May since 1979.
The maximum air temperature of 17.3°C was measured on May 29.
The mean wind speed for the month was 14.6mph compared with the long term mean of 12.1mph ranking it the fourth windiest May on record.
The strongest winds were recorded on the blustery 23rd, with a gust of 55mph at the airport.
Total rainfall at Ronaldsway measured 53.1mm, slightly above the May mean.
The wettest day was the 27th with 11.1mm.
There were 241 hours of sunshine last month, once again slightly above the long term mean.
Hail was observed on the 11th but there was no thunder or fog at airport during the month.