Low pressure is now becoming increasingly influential across much of the UK and is set to dominate the weather for several days to come meaning that all areas will see some rain or showers developing along with cooler conditions. The cool and changeable theme then looks like lasting for the rest of the month which will come as something of a shock following the recent fine and warm weather.
To start with this morning a band of cloud and rain is affecting parts of Scotland and Northern Ireland and this rain will slowly sink southwards today, reaching northern parts of England and North Wales by this evening allowing much colder but brighter conditions across northwest Scotland to follow on, although some showers will develop and these may turn wintry in places. Meanwhile to the south of the rain band, across the rest of England and Wales, there will be some warm sunny spells around for a time today but there will be an increasing risk of showers breaking out this afternoon and evening, these potentially turning heavy and thundery in places later on, most likely over the Midlands and into East Anglia. Top temperatures today will range from 14°C to 18°C across England and Wales, but turning colder in the north with parts of northwest Scotland only seeing highs of 6°C to 9°C and feeling colder here as a northerly wind picks up.
Tonight sees heavy, thundery showers across central and southern regions continuing for a time whilst the band of cloud and rain further north slips south so that by the end of the night central, southern and south-eastern parts of England will be rather cloudy with some rain at times. To the north it will be cold with scattered showers in the far north and west turning wintry in places, whilst a touch of frost will also form, but for the south it will stay mild with temperatures staying in double figures. Sunday will see cloud and rain across southern and south-eastern England only slowly slipping away to the southeast so it could be damp for the London Marathon, but elsewhere it will be a bright but colder day with sunny spells and showers developing, some of the showers turning heavy with hail and thunder whilst falling as sleet or snow in the north.