Net Weather is going for a colder than average November:
https://www.netweather.tv/weather-forecasts/uk/long-range/seasonal
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Conclusions
Taking the evidence together as a whole, it looks probable that September will be more anticyclonic than usual over the British Isles, with a stronger than usual Icelandic low, which means that the north and west of Scotland will be more prone to bouts of wet and windy weather but for most of the UK a warmer and drier than average September is likely. For October the signals are weak but there is a general theme of pressure being above normal across central and northern Europe, with southerly winds slightly more frequent than normal over the British Isles. For November there is a consistent signal for cyclonic and fairly cold weather, with a region of above average pressure extending from the eastern North Atlantic to southern Greenland, suggesting that northerly and north-westerly winds will blow more frequently than usual for the third November in a row. The persistent and strong easterly phase of the Quasi-Biennial Oscillation may also promote cold blasts, most likely from the north, during mid to late November.
Temperatures
Temperatures for the autumn of 2018 are expected to be above the 1981-2010 average for England, Wales and Scotland (about 80% chance) but not exceptionally so, with positive anomalies of about 0.5C most likely. For Northern Ireland, near average temperatures is the most likely outcome, thanks to the proximity of the cold anomaly in the North Atlantic.
Both September and October are most likely to be warmer than average, albeit not exceptionally so, mainly due to frequent anticyclonic weather in September and southerly winds blowing more frequently than average in October. September is 80% likely to be warmer than average, October about 60-70% likely to be warm.
November is looking about 60-70% likely to be colder than normal, with frequent northerly and north-westerly winds. The negative temperature anomaly will probably be largest over Scotland and Northern Ireland. However, severe cold outbreaks look unlikely, because of a high likelihood that the Arctic will be exceptionally warm, in view of the fact that most recent Novembers have been unusually warm in the Arctic and so was the analogous November of 1996.
Home Location - Kellands Lane, Okehampton, Devon (200m ASL)
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Sean Moon
Magical Moon
www.magical-moon.com