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 15th August to 21st.
Low pressure is in control of this period. This will bring overall breezy, windy conditions at times. Rainfall will be just slightly above average. Friday will see a lot of heavy rain but the weekend and first couple of days of next week will see some showers. The temperature looks to be 1 or 2 degrees cooler than average for mid August.
Week 2 22nd August to 28th.
High pressure will be in control of our weather bringing some dry conditions with temperatures 2 or 3 degrees above average especially for the north of the UK.
Week 3-4 29th August to 11th September.
We could see a gradual change in the position of the high pressure moving northwards with slightly low pressure South West of the UK. The first week of September could be still mainly dry and warm but during the second week we could see more showery conditions. Temperatures could still be slightly above average for early September.