Not Weird at all, just normal weather patterns, I have been there in August when it was just 1c and in late October when it was 20 plus. There have been fewer than normal closures due to bad weather this season but it happens from time to time. September/October are usually the best months weather wise, there is a long period when temperatures at 2,000 metres are not much lower than in the valleys. Not much sign of that for the next couple of days though but I am sure normal service will be resumed soon.
I do hope so I want on lt run over the road before I return to live in the UK a the end of September.
John