Well... raw values from the somewhat insane GFS 12z run suggest my local mean to dip to around 17.4*C to the end of Friday before climbing relentlessly upward to finish the month at between 18.6 and 19.0*C.
Allowing for typical underestimation of temperatures and a finish some way into the 19s is a reasonable interpretation from that particular run.
A very rough CET estimate given the lack of recent updates places the finishing number using this run as between 18.0 and 18.5*C.
This is of course just for fun because support is very limited for such events to take place as that op run depicts; just 5 GEFS members go into anything like that sort of territory for heat late-month, and the other models pretty much don't want to know about much other than a cut-off low nearby this weekend that drifts across Mon-Tue before finally clearing away east but with only tenuous ridging from the Azores. No 19s finishes here from those runs, or 18s for the CET region for that matter.
Could still achieve a respectable final number though, down to some fairly mild nights at least; this relating to a propensity for a lot of tropical maritime air to be fired our way across the Atlantic by some deep troughs near Greenland.
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T-Max: 30.2°C 9th Sep (...!) | T-Min: -7.1°C 22nd & 23rd Jan | Wettest Day: 25.9mm 2nd Nov | Ice Days: 1 (2nd Dec -1.3°C in freezing fog)
Keep Calm and Forecast On