>Weather balloon climbs to 5,300 metres before temperature falls to 0C amid late summer heatwave The 0C line “affects vegetation, the snow line and the water c

>Weather balloon climbs to 5,300 metres before temperature falls to 0C amid late summer heatwave The 0C line “affects vegetation, the snow line and the water cycle, so has a considerable impact on the habitats of humans, animals and plants alike”, MétéoSuisse said. It averaged 2,570 metres above sea level from 1991 and 2020, fluctuating between 1,000 and 2,000 metres in winter, and 3,000 and 4,000 metres in summer.