There will be dull and misty conditions across many central and eastern parts at first today. These should become confined to eastern areas through the morning, with some patchy rain and drizzle here.
Many southern and western areas will brighten up slowly and will become warm. There is then the risk of some thundery showers in the far south-west this evening.
Tonight temperatures will be staying remarkably warm for the time of year, although some mist and fog may develop across central and eastern areas.
The sunshine and warmth will be staying with us this week, although there will be increase in the chance of showers as we approach the weekend.
After a slow, grey and foggy start this morning, cloud will be reluctant to shift for many this afternoon.
There'll be a few showers developing across eastern Scotland and parts of the West Country, West Midlands and Welsh borders.
It'll feel warm with highs of 24C but expect it to feel close and muggy.
Today will be mostly dry with some sunshine after a dull, misty start.
However isolated showers - some heavy - are possible across southern Britain and perhaps in north-western areas too. Heavy rain will become confined to the Northern Isles, where it will also be breezy.
Moving into this evening, extensive low cloud, mist and hill fog will affect many central and eastern parts of the UK, with drizzle in places.
But the west will stay dry with clear spells.
By Lucy Verasamy, ITV News Weather presenter.
Temperatures will be on the up in the next few days, with highs of 25C or so in the sunshine by Thursday, but don't expect full-blown blue skies.
Overnight misty low cloud will be slow to shift through the early mornings and a few showers will develop here and there.
In the sunshine it'll feel more like late summer than early autumn but cloud cover will make it feel muggy and close.
Nights will also feel unusually mild and stuffy for the time of year.
Breezy with some rain shuffling into eastern Scotland today.
Elsewhere occasional showery outbreaks of rain possible in places - generally hit and miss - with most of us staying dry.
There'll be a lot of cloudy sky but some sunshine - the best of the blue skies across southern locations and with a 22C it'll feel pleasantly warm for the time of year.
ITV weather presenter Lucy Verasamy has the latest:
It will be mostly cloudy and rather misty for eastern and central Scotland as well as far northeast England. There will be some rain here, and this is likely to become more persistent later on.
Elsewhere, the morning mist, low cloud, hill fog and patchy rain/drizzle will slowly clear to leave a brighter afternoon with best of the sunshine in south and far northwest.
Scattered showers are set to develop, these mainly over northern and eastern England where they could perhaps turn heavy in places. Temperatures are generally likely to be similar to Sunday, although it will be cooler under the cloud and rain in Scotland.
Watch Amanda Houston's latest weather forecast: