Here is the data from NOAA online for Shoeburyness, correct to 0.01 inches, under PRCP. This data is sourced from the MetOffice. Hope this helps.
http://www1.ncdc.noaa.gov/pub/orders/CDO6492935863751.txt
June 2012 - Colwyn Bay
Temperature -
Mean - 13.4C
Mean Maximum - 17.9C (+0.9)
Mean Minimum - 9.5C (-0.5)
Maximum - 23.4C
Minimum - 5.8C
Lowest Maximum - 11.4C
Highest Minimum - 14.7C
Rain
Total Rainfall - 127.0mm (216.7%)
Wettest Day - 8th - 21mm
Rain Days - 21
Wind
Highest Gust - 17mph
Average Speed - 0.9mph
May 2012 - Colwyn Bay
Temperature -
Mean - 11.5C
Mean Maximum - 16.6C
Mean Minimum - 6.7C
Maximum - 28.6C
Minimum - 0.4C
Lowest Maximum - 10.6C
Highest Minimum - 11.0C
Rain
Total Rainfall - 42.2mm
Wettest Day - 9th - 8mm
Rain Days - 14
Wind
Highest Gust - 19mph
Average Speed - 0.7mph