London hit by an intense hail storm - Jonathan Brady/PA Wire More wet weather is forecast to follow this week after thunder and lightning was joined by a freakish hail storm sweeping across south London yesterday. The weather in London has certainly been unpredictable in recent days, with hail storms, thunder and lightning and heavy downpour punctuated by spells of sunshine. London having all the weather at the same time. pic.twitter.com/tQnGLm7QJf David Nicholls (@DavidNWriter) May 17, 2021 An after weeks of downpour and stormy weather, May 2021 could become one of the UK s wettest on record, and the Met Office has predicted a matching end to the month.