This is the latest outlook for the next four weeks from the Japanese Met Agency the JMA. It is not meant to be a forecast but a general outlook. I have added the 3 images together and rotated them and added a red line so you can see the UK. Blue colours are low pressure area’s and oranges high pressure area’s.
Week 1 29th August to 4th September.
The UK is sandwiched between high pressure to the West over the Atlantic and to the East over Europe, low pressure will be to the North of Scotland. This will bring slightly above average rain for England and Wales with Scotland having even higher rainfall. Temperatures looks to be around 2-3 degrees below average.
Week 2 5th September to 11th.
High pressure stretches over the mid Atlantic over the UK and Scandinavia. This will bring mainly dry conditions with the temperatures being around average for early September. I think there will be mainly an easterly airflow this is why I don’t expect high temperatures.
Week 3-4 12th September to 25th.
High pressure is set to be over Europe with low pressure to the West over the Atlantic. This is a two week period and there will be a change taking place to above average rainfall. This is possibly because there will be a south-westerly airflow, but this will mean the temperatures will be around average for mid September.