Current output now suggesting something warmer for next week but only briefly.
My latest calculations suggest we could get close to 16C for September as a whole. Currently the final day of the month is looking easily the coldest of the month. We need the warmer weather to hold on for another day if we want to have a 16.0C month.
Currently I expect the CET to be at 16.06C on the 29th but drop off to 15.90C on the 30th. So we will be very close and if we do see some high temperatures next week then 16C is quite possible.