The ultra long range weather forecast is based on data from the the Climate Forecast System v2 (CFSv2) model. It is updated daily.
Weather, max and min temperatures, wind speed and direction, pressure.
Number of days: snow, frost, wind stronger than 30mph, temperature max, min and above 21°C.
Forecasting the weather more than a few days ahead in Great Britain is very difficult. Consistently accurate long rang forecasts are not possible with current technology.
You can use this page to try and identify trends. For example, are the summer months showing long settled spells or the winter months cold ones. Is the forecast consistent from day
to day or is it changing dramatically? If it is the former then confidence could be higher.
Above all don't rely on this page but have fun using it.
Seasonal discussion forecasts on TheWeatherOutlook consider other factors and could be very different.
UK autumn 2022 weather outlook
August bank holiday weather
Is it going to rain
Drought in eight areas of England
Autumn 2022 UK weather
Daily weather by email
14 day outlook
A huge range of charts and data is freely available.
Models include UK Met Office UKV and MOGREPS-G, ECMWF, NCEP GFS, Meteo France Arpege and Arome.