It will be a dull start for England and Wales with occasional rain and drizzle.
Brighter conditions will spread from the northwest, though some southeastern parts remaining murky with perhaps the odd sharp shower.
It will turn breezier in the far northwest with a few showers.
Tonight there is a chance of further drizzle, low cloud and increasing amounts of hill fog in southeastern areas, otherwise it should be fine with fog patches in prone rural spots and chilly in the north and west.
It will be a cloudy night with rain spreading south-east, but it should be brighter in the north of the UK tomorrow.
ITV Weather Presenter Amanda Houston reports.
It will be a fine and dry day for most of the UK with temperatures between 18C and 21C.
However, later on cloud will increase and there will be outbreaks of rain in Scotland and Northern Ireland which will spread to the southeast.
It will be a mostly fine day for many with light winds and sunny spells which will make it feel quite warm at times.
Cloud and rain will spread into the north-west later, bringing freshening winds.
Tonight will see occasional rain and drizzle with extensive low cloud and hill fog will continue to spread south and east to most parts.
Clearer and drier conditions will follow into the northwest.
It is an unsettled day across the UK with quite a few showers around and chilly temperatures, although it will be dry and bright in the East.
Most places will have a fine and dry day with plenty of sunny spells. However, cloud amounts will continue to build across southwestern parts of the UK through the day with some patchy light rain developing here.
The rain is likely to spread across the rest of Wales and into Northern Ireland through the evening.
Maximum temperatures reaching 22 Celsius across the London area.
Settled, dry and fine conditions are expected in the north and east of the country this afternoon, while the southern counties can expect heft, slow-moving downpours.
These will gradually ease to leave a better end to the day.
Most of us will see a big improvement by early evening with some late sunshine.
Highs of 20C at best and a little close feeling where it stays grey and damp this afternoon.
Another remarkably cold night for the time of year.
Temperatures will fall near freezing point tonight with even a touch of frost possible in rural spots.
Tomorrow, bright or sunny spells initially before cloud rolls into Northern Ireland and the south-west bringing the first signs of rain later.
Staying cool for mid August - we'll have to wait another week or so for things to warm up again.
A bright afternoon is expected ahead of an unsettled bank holiday weekend.
This weekend will follow the usual bank holiday tradition of having one "soggy" day.Read the full story ›