What happened to "Summer is a-coming in?"

...surely I remember that being a folky-type song that we had to sing at primary school at the beginning of May?

In which case, why is today wet, gloomy and chilly?!?   Horses have their rugs back on and I've just come in and lit a fire after getting well and truly soggy poo-picking the track and moving haylage...It seemed so nice at the weekend, as well, despite the bank holiday...

We are hoping for better weather at the weekend because doing the Golden Horseshoe pleasure ride in the pouring rain is NO FUN AT ALL - I remember it all too well a couple of years ago (!).