In Finland, where the average July temperature is about 18C (64.4F), the mercury has topped 30C in places. Steve MacLellan 6 years ago In Finland, where the average July temperature is about 18C (64.4F), the mercury has topped 30C in places. https://news.sky.com/story/arctic-circle-wildfires-rage-on-as-blistering-heat-takes-hold-of-northern-europe-11443819