Hey, we just got back this week!
I have to say, I have never seen such bizarre weather! We arrived 6 days ago in the blazing sunshine (DP and I both got sunburn!), the next day was windy, and the following two days were FREEZING and very wet. The parks were more empty on the plus side, but it can be fairly miserable when it's like that unfortunately, we went home to change when we got soaked!
As for cold... We left on Wednesday, and on the Eurostar back we were completely shocked to find SNOW on the ground at around 9pm!! The whole train was shocked as it had been so hot a few days previously!!