Tuesday
A low tracking up the western half of the country with its fronts bringing rain to most places.
Its looking like a dry and mild start with southerly winds freshening during the day. Rain moving in from the west, probably by about lunch time, then rain at times through daylight hours.
Temperatures from 11C to about 16-17C in spite of the rain
Wednesday
Low pressure to the north and high to the south giving a westerly flow.
Sunny spells from the outset and through the day. Just a small chance of a passing shower on the decreasing westerly winds.
Temperatures from about 10C to around 17C in the afternoon.
Thursday
High pressure south east of the country with a deepening low moving to near Iceland.
Dry here with good spells of sunshine as a light southerly picks up to a moderate south westerly during the day.
Temperatures from about 6C (only a small chance of any short lived mist) to around 15-16C
Friday
Little change in the synoptic pattern so little change in the weather.
Too much breeze for any mist or fog problems. A dry day with spells of warm sunshine.
Temperatures ranging from 9C to about 17-18C
Weekend
A dry weekend in prospect, good gardening weather, with sunny spells and pleasant temperatures, perhaps getting near to 21C(70F), which would be very acceptable for this time of the year.
Beyond
Current indications are the high over Europe will hold sway over our part of the world well into the week, but another look at prospects on Friday.
And for further ahead then try the link below. It gives a very broad brush treatment to whether it will be dry/wet/windy/warm or cold. So far I have had reasonable success with it since I started doing it in late January.
The change over from winter to summer is proving rather difficult but still with a reasonable degree of success.
Updates will restart on Wednesday 24 September and will normally be done each Wednesday for 10-18 perhaps 21 days ahead.
for even further ahead then I do a comparison between how the UK Met Office and the American CFS system compare in their seasonal forecasts. Currently its showing the remainder of autumn(September-Novemember), and winter (December-February).