Autumn clothes out in summer

One thing at the moment that's getting on my nerves is the fact that shops bring out Autumn clothes in July. Why the hell do they do this? The fact that it's still summer, some people, e.g. me may still need some summer clothes. I know you're thinking "you've left it a bit late" but I went to Primark for a few more things for my holiday. The reason I went was that I saw something last week, but didn't have enough money for it so I thought I could get it another day. So when I went again in the same week and you would expect it to still be there. However, as you can tell, it wasn't. See I know British weather isn't the best, but jumpers in July is just weird. I guess you could argue that the jumpers are thin, but they definitely wouldn't suit Spanish weather. Obviously this is something to learn from, so next year I will make sure to go shopping earlier in the year. The thing is when you walk into a shop and you're there to buy what you need then you find it's not there, it is so annoying!