Which one

Back to rain once again must have had summer yesterday and it's Friday the 13 th , not sure where this aversion the the number 13 came from it does seem rather strange , I'm sure someone on blip will know ,
Searching through a large box of old keys to find one that fits an old lock I think I'm on a futile search been through them all and non fit, soon the weekend and a good forecast is predicted :-D