I have observed over the 15 years I have lived here the spring just 'arrives'. September 1st is like somebody flicks a switch, and it is hot.
Don't be fooled by this summary. Today was freezing (OK it got up to 21) so I don't know where they get off saying it was a nice, mild 25. I may have to put a fluffy blanket on the bed. Anyway, you can see that there is no prediction of a sudden change to 29-30 max on the first of September, but I figure that will be the go. I notice it every year, and while this may be a slightly weird year I expect to be hot after Wednesday. I'll let you know.