The last two months were the foggiest July and August on record, the latest Met Office figures show.
In August, there were six days with fog at Ronaldsway, almost twice the long term average.
It followed on from July, which saw nine days with fog at the airport. It beats the previous record of 14 days by one day – recorded in both 1947 and 1980.
The mean daytime maximum temperature last month was 18.1C, equal to the long term average for August. Nights were slightly warmer than average, with a mean of 13C.
The hottest days were August 25 and 27, when the temperature reached 21C.
In fact, August 25 was also the coolest night, when the thermometer dipped to 10C.
Rainfall totalled 54.7mm, about 10mm fewer than the long term average. The wettest day was August 5 with 14.3mm.
In total, there were 158 hours of sunshine, about 28 hours fewer than the long term average.
August 25 was the best with 13.3 hours.
The mean wind speed for the month was 9.7 knots, which is average.
August 17 saw the strongest winds with gusts to 41 knots (47mph).
No hail, thunder or gales were recorded.