St. Swithin (also known as St. Swithun)
St Swithun died in 862 as bishop of Winchester. It is not known when he was born, but he was a secular clerk with something of a reputation for virtue and learning. He was attached to the West Saxon court and was one of King Egbert's principal advisers. He was given the king's son, Ethelwulf, the father of Alfred the Great, to educate; and to him must go some of the credit for the strongly religious tone of the West Saxon court under Ethelwulf and his sons.

He was consecrated bishop of Winchester in 852, and as bishop was something of a builder. He may also have been one of the first contributors to the Anglo-Saxon Chronicle. A number of agreeably humble miracles were attributed to him - he was said to have restored a basket of eggs dropped by an old market woman when crossing a bridge. His great reputation for sanctity is, however, largely owing to the cult which sprang up at Winchester a hundred years after his death, in the time of St Ethelwold and the monastic reformation, when his body was translated. His shrine was splendid, but when it was looted by Henry VIII in 1538 its gold and Jєωels were found to be false.

When he died he was buried at his own request in the churchyard, in order that the passers-by would walk over his grave and the rain fall upon it. It is always said that if it rains on his feast day, it will rain for forty days after, but it is not known how St. Swithun came to be associated with the weather. Similar stories are told of SS Medard, Gervase and Protase in France.

http://www.catholicculture.org/culture/liturgicalyear/calendar/day.cfm?date=2014-07-02