According to the Swedish National Food Administration, a car standing in the sunshine can heat up to a veritable 50 degrees, not a good idea if you leave your weekly shop bundled up inside for an hour or so.
Sweden may not get the hottest summers in Europe, but food preparation and storage is still affected during July and August, and this is when food poisoning cases go up significantly.
Amongst the tips given by the National Food Administration are to lower your fridge temperature to 5 degrees, and to pack plenty of ice packs in your picnic box.
Keep raw meat in separate containers and wash your hands thoroughly after its preparation. Take extra care with hygiene and storage and the sun will be your best friend this summer.