While it is still a temperature record, I want to point out that +30C range temperatures were not unseen there before. There are hot summers in Siberia due to the extreme continental climate.
(Source: was born in Siberia).
(Source: was born in Siberia).
My knowledge is limited, if there's a meteorologist reading this comment, please enlighten us on the topic.
I'll grant you that Barnaul certainly knows of 35c+ temps, but arctic circle? Heat records have been broken. Source: broken heat records.