The numbers are in. Meteorological summer in #Helsinki was the hottest ever recorded: 18.9°C. 🌡️🚨
— Mika Rantanen (@mikarantane) September 1, 2021
This breaks the previous record from 2018 by 0.6°C. Records have been kept since 1845. pic.twitter.com/k9KgR1LZ6U