The persistent cloud cover combined with the brisk northeasterly breeze meant a cold day on Friday with the thermometer not rising above 9.4C, which was a significant 4.7C below the 39-year average.
Light rain began to fall just after 12.15 that produced 0.6mm of precipitation and took the monthly total to 55.3mm, just below the average off 56.6mm.
The wind veered into the southeast late in the day that combined with less cloud saw the thermometer drop steadily during the evening to reach a minimum of -1.7C at 05.38 early Saturday. This was the second coldest night in April.
Saturday dawned with fog that initially limited visibility to around 500m but by 07.30 was dispersing. Broken sunshine soon followed but the thermometer had only reached 0.5C by 08.00. The barometric pressure at 08.00 read 1006.1mb, the lowest pressure for a week.