Festivalgoers will see a mixture of sunshine and showers on Sunday, with the potential for hail and thunder.Scattered showers will mainly affect Scotland at the start of Sunday before spreading south into England, where some could turn heavy and thundery including around Leeds Festival, the Met Office said.Reading Festival and Notting Hill Carnival could see occasional showers, with conditions turning wetter into the evening. Monday will be drier and brighter, but still with some showers.This year marks 60 years since Notting Hill Carnival began in 1966 and, while Saturday saw a quieter start with young performers taking to the stage at the traditional Panorama steelband competition, Sunday is expected to draw far bigger crowds as the carnival takes to the streets.It comes after music lovers donned ponchos and braved the mud at festivals across the UK on Friday and Saturday.Met Office meteorologist Honor Criswick said: 'On Sunday there will be some scattered showers around to start, mostly across Scotland, Northern Ireland might see some.'Quite a few areas are going to be relatively dry to start, then it's going to gradually turn more showery.'Early afternoon Leeds Festival could see showers, could potentially turn quite heavy and thundery. Friends arrive armed with their rain ponchos for Saturday at Leeds Festival Festivalgoers shelter from the rain in plastic ponchos as they walk through the muddy site at the Reading Festival at Little John's Farm, Reading, Berkshire. Picture date: Saturday August 29 The girls did not seem to have a care in the world as they had fun in the mud Pedestrians with umbrellas in Notting Hill caught in a heavy downpour. The forecast is for unsettled weather and rain over the bank holiday weekend during the Notting Hill carnival Heavy rain continues to move eastwards across England, Wales and Northern Ireland, which may lead to some disruption in places'For Reading Festival and Notting Hill Carnival it will be not too bad for the majority of the day, the odd shower might pop up - it's not until later in the evening we could see some showers, from 7 or 8pm.'The South East could remain dry, but by the evening they will probably start to see some showers, they also could be heavy and thundery.'Temperatures in the low 20s for many areas.'She added: 'It will probably be quite dry first thing on Monday, some showers across western areas, some heavy showers mostly across north Scotland.'For many areas it's going to be turning drier and brighter, a better end to the day compared to the start.'On Monday there will be some showers around but probably less heavy thundery ones and a few more brighter spells, it's still probably worth taking a waterproof if you're at a festival.'Monday will also see maximum temperatures in the early 20s.'Nine areas were covered by Environment Agency flood alerts, meaning floods are possible, as of Saturday night.It comes after continued hot weather across the UK, which coincided with extremely dry conditions.The Met Office has previously said the UK is on course for its hottest summer on record after five heatwaves, with temperatures of up to 38.1C recorded in London.Festivalgoers at Reading Festival were pictured frolicking in the rain during the event, with many laughing and posing for photos as they remained in good spirits despite their outfits being drenched in mud. Festivalgoers frolicking in the rain during the Reading Festival at Little John's Farm, Reading, Berkshire. Picture date: Friday August 28, 2026 Young women wearing rain ponchos at Reading Festival Festivalgoers braving a rain shower during the Reading FestivalGeese frontman Cameron Winter warned festivalgoers not to 'drink the water' on Friday as heavy rainfall seeped through the tent during their set.Met Office meteorologist Greg Dewhurst said: 'An area of low pressure is currently pushing eastwards across England and Wales and Northern Ireland, pushing rain across the country. That's going to be followed by heavy showers.'Temperatures generally reaching the low 20s, highs of 22 to 23C.'It will be a different picture for Scotland even though it's largely cloudy, there will be some brighter spells.'For most it's quite a bright start tomorrow, but it won't be long before showers bubble up.'We will see heavy showers developing throughout the day in the north and west of the UK and some thundery weather.'With tomorrow being a bit more of a day of sunshine and showers, it should mean with a bit more sunshine around temperatures will be a bit higher, with highs of 20 to 23C for most and isolated areas could see 24C.'Monday will be a brighter day for most, quite a lot of cloud around, but also showers, more frequent in the north of the UK. 'Temperatures may come down a touch, between 19 to 22C, maybe locally 23C.'