This cold snap feels a bit unique for the time of year but it is n't.
Last year the end of April brought exactly the same chill.
We had hail on three days, and a min of 0.5C on 28th April 2016.
Today we have had the odd hail shower, wonderful cumulonimbus capillatus, and a min overnight of 1.1C.
Only 0.1 mm in my 5 inch copper gauge though so the drought continues.
Len
Wembury, SW Devon coast