We are also off on Sunday.
BBC Weather Centre has Sunday as sunny & 8 oC and Monday as sunny 10 oC.
Not sure if I want this to be right or not as I packed mine & daughters case yesterday and have included waterproof ski pants,long sleeve tops and fleecy jumpers!!
Similar happened in October. We packed for winter, and ended up wearing short sleeves,no coats and ate Ice Cream - In October? We didn't even manage that in August when we went to Devon!!
Suppose we will just have to wait and see.