This is the outlook for the next four weeks using the JMA issued by the Japanese Met Agency. This is just one model the JMA but followers will know that I normally publish it every Thursday or Friday. I have added the three images together and I have rotated them and added a red line so you can see the UK. Blue colours are low pressure areas and orange’s colours are high pressure areas.
Week 1 20th September to 26th.
Low pressure to the North of the UK and high pressure to the South. To start off with we will see some stormy conditions with above average rainfall and temperatures 2 or 3 degrees below average. We should start to the some improving conditions early next week with higher pressure moving northwards becoming drier.
Week 2 27th September to 3rd October.
Low pressure will be in control bringing a northerly airflow bringing showery conditions with rainfall slightly above average. It will feel very cool with temperatures 2 or 3 degrees what you would expect for the end of September early October.
Week 3 -4 4th October to 17th.
Low pressure to the North of the UK over Greenland and over the North Atlantic. This will bring slightly above average rainfall and temperatures feeling cool with temperatures around average.