July 15 is St. Swithin's Day. Tradition says that whatever the weather is like on St. Swithin's Day, it will continue so for the next forty days.
Here is the weather rhyme that has been around in the British Isles since Elizabethan times.
'St. Swithin's day if thou dost rain
For forty days it will remain
St. Swithin's day if thou be fair
For forty days 'twill rain nae mair.'
It's also a day to make an apple dessert or at least eat an apple. St. Swithin is the patron saint of apples and apple growers used to ask St. Swithin for his blessing each year because they believed:
•Rain on St. Swithin's day 'blesses and christens the apples'.
•No apple should picked or eaten before July 15th.
•Apples growing at St Swithin's day will ripen fully.