40 days of rain predicted following St Swithin's Day, according to UK weather forecasters.

40 days of rain ahead as St Swithin's Day folklore could come true, UK weather forecasters warn. Britain faces weeks of soggy low pressure and showers after St Swithin's Day soakings, with weathermen predicting some truth in the old saying. St Swithin's Day, on July 15th, has an important link to summer, with the belief that if it rains on that day, it will then rain for the next 40 days.