The UK's warmest Remembrance Sunday has been recorded successful northbound Wales.
Temperatures successful Porthmadog, Gwynedd, soared to 21.2C (70.2F), besides making it the warmest 13 November connected record.
It bushed the erstwhile grounds by much than 2 degrees acceptable 33 years ago, besides successful Gwynedd.
England and Scotland besides saw records breached for the warmest Remembrance Day with highs of 19.2C (67F) successful Bridgefoot, Cumbria, and 17.2C (63F) successful Aviemore.
The erstwhile grounds somesthesia connected Remembrance Sunday was 19.1C (66F) successful Aber, besides successful Gwynedd, successful 1989.
The average somesthesia for November successful the UK is betwixt 4C and 10C (39F to 40F).
However the Met Office expects the mild autumn temperatures to autumn this week to what would usually beryllium expected for the clip of year.
BBC Wales upwind presenter Sue Charles said: "It has been a precise mild play for November, particularly successful Porthmadog that saw a grounds somesthesia for the UK for this precocious successful the year.
"However the upwind volition instrumentality to thing overmuch much seasonal passim the week."
Temperatures crossed the UK person been "exceptionally mild" for the clip of year, with Scotland and Northern Ireland having besides recorded the warmest November night connected grounds earlier this month.
Meteorologists accidental the mild upwind was the effect of a almighty pitchy watercourse bringing lukewarm aerial up from the south.
BBC Weather's Simon King said: "A south-west upwind is dragging successful aerial from the Tropics, astir the Azores and Cape Verde - wherever it is inactive lukewarm astatine this clip of twelvemonth - and that milder aerial is spreading northbound to the UK."
The upwind volition stay mild for the commencement of the week, with a upwind informing for rainfall issued for immoderate parts connected Tuesday.
A yellowish alert for rainfall has been issued by the Met Office for southbound and cardinal Wales, south-east England, south-west England and westbound Midlands until 13:00 GMT connected Tuesday.
A further alert is besides successful spot for Central, Tayside and Fife, and Grampian areas of Scotland, betwixt 12:00 and 21:00.
Is this a effect of clime change?
While the lukewarm aerial being dumped implicit the UK is unusual, it is not a one-off.
The warmest recorded daytime somesthesia successful November successful the UK was successful 2015, erstwhile temperatures reached 22.4C - an lawsuit that was besides linked to the pitchy stream.
King added: "Climate alteration whitethorn beryllium altering the emblematic presumption of the pitchy watercourse further northbound - erstwhile considering its horizontal position/latitude averages implicit decades. This is different, though, from this script wherever the pitchy watercourse is meandering northbound to southbound similar a large U."
However these latest highs travel astatine the extremity of what has already been the hottest twelvemonth connected grounds successful the UK.
England, Wales and Scotland each experienced their highest ever temperatures successful July, including recordings of 40C (104F) for the archetypal time successful the UK.