The old poem goes like this

“St Swithin's Day, if it does rain
Full forty days, it will remain
St Swithin’s Day, if it be fair
For forty days, t'will rain no more"

Swithin was a man born in or around the year 800. He became Bishop of Winchester.

Unlike other religious figures, he asked not to be buried in a prominent place within Winchester Cathedral, but outside in a simple tomb "where the sweet rain of heaven may fall upon my grave".
The legend says after his remains were moved inside there was a great storm and it rained for many weeks after.

Well, I’m guessing we have the weather forecast for the next forty days then. 

Keep these brollies handy … although, it may please the various water companies. 

Enjoy Tuesday, all.