With another 1.5mm of rainfall on Monday it brought the monthly total to 59.8mm, just 0.2mm above the 37-year average.
The thermometer rose to it highest this month with a maximum of 16.8C, however, this was still 0.5C below the average. Overnight the temperature dropped away to a minimum of 6.1C at 02.33, which was 0.8C below the average.
Tuesday morning brought sporadic brightness and brief glimpses of sunshine between breaks in the cloud.
So far this month not one day has seen the maximum temperature rise above the average and only nine nights have been warmer than average. The mean temperature for May so far is a significant 2.3C below the 37-year average and very similar to the result for April.