My ideal Autumn would start with a fortnight of very warm, settled weather but this pattern would change towards the equinox to more changeable and cooler conditions with spells of heavy rain and strong winds (not severe gales though) interspersed with crisp bright and clear autumn days. October would start reasonably quiet and settled but with cooler nights threatening the first frosts. As we get to the last third of the month and into November, with the trees devoid of leaf, some exceptionally wet and windy spells with rivers in full spate, would be my favourite weather.
Into late November, I would look forward to a vicious low to slip down the North Sea during a period f high Spring tides creating a storm surge on the east coast(suitable warning and protection measures having been issued) followed by an artic outbreak with hard frosts and heavy snow showers in the usual places prone to northerly showery activity. A return to wet, stormy conditions for the end of November/ early December with a significant wind event, would be my fantasy scenario. From mid-December to late January, a Siberian air mass would frequently mix with southern displaced deep Atlantic lows would bring frequent heavy blizzards and continuous sub- freezing temperatures. As we move to February, the weather would become milder and more temperate!