Muddy conditions are likely as Sunday afternoon will see thunder hitting the Somerset site

Rain has been predicted for this month’s Glastonbury Festival, with thunderstorms expected to hit the site on the Sunday afternoon.

The long-range Accuweather forecast for Pilton, Somerset says that Thursday June 27 will see “a little morning rain” with temperatures reaching a high of 18°C and a low of 11°C.

Arctic Monkeys‘ headline day – Friday June 26 – will be “mostly cloudy with a shower” with highs of 18° and lows of 12°, whilst Saturday June 27, the day The Rolling Stones take to the Pyramid Stage, will see “spotty showers” and highs of 19° and lows of 12°.

A thunderstorm has been predicted for the afternoon of Sunday June 27, the festival’s closing day and the day of Mumford and Sons‘ set. Temperatures will reach a high of 17° and a low of 12°.

Yesterday (June 13), Glastonbury organiser Michael Eavis clarified the festival’s alcohol policy after an email was sent out to ticket holders causing confusion as to whether festival-goers would be allowed to transport alcohol onto the festival site using wheelbarrows or trolleys.

“In reference to the email about alcohol that went out to Glastonbury 2013 ticket holders this morning, my personal preference is for people that come to our festival to drink much less!” Eavis wrote on the festival’s website. “However, Glastonbury remains the only major festival that allows people to bring their own alcohol in, and you are still OK to bring your own alcohol through the gates, providing it’s just for your own use (whether it’s on a trolley or not).”

This year’s Glastonbury festival is to be live streamed for the first time with viewers able to watch different stages as sets happen. The BBC will use the latest digital technology to allow viewers to choose from simultaneous live streams from all the major stages and has announced that over 250 hours of footage will be broadcast across the weekend.

Click here to see the full list of artists and stages for Glastonbury 2013.