Orders placed on suppliers grew at a slightly quicker pace than in the previous month, but are expected to slow significantly in August.
Sales volumes also in 'normal goods' (which includes flowers, watches and jewellery) were up 42 per cent and hardware & DIY was up 11 per cent.
CBI distributive trades chairman and Asda chief customer officer Barry Williams said: "Summer trading is traditionally slower across the retail sector but warm weather can often provide a welcome boost, as we saw towards the end of June and the beginning of this month.
"Despite the upbeat outlook for the UK economy, retailers are still finding conditions challenging and it's certainly something every shopkeeper will need to keep an eye on.
"Meanwhile, the recovery in wage growth should help support growth further down the line."
Some 36 per cent of retailers said that sales volumes were up in July compared with the previous year, whilst 15 per cent said they were down, giving a balance of +21 per cent, below expectations (+33 per cent). Some 30 per cent of firms expect sales volumes to increase in the year to August, albeit at a slower pace, with 17 per cent expecting a decrease, giving a balance of +13 per cent.