Rosqvist said if melting continues at the same pace, the south peak will no longer be Sweden's highest point at some point later this month.
In Kiruna, a town east of Kebnekaise that is located north of the Arctic Circle, temperatures were expected to reach 66 degrees on Thursday, according to the World Meteorological Organisation. That's well above the average August high of 57 degrees.
The mercury isn't expected to cool significantly on the continent any time soon. In central Portugal, temperatures are forecast to reach 125 degrees this weekend — potentially the highest level ever recorded in Europe.
Rosqvist said if climate change means summers like this become the norm, the glacier on Kebnekaise could disappear in 30 years.
The hot temperatures have also contributed to Sweden's worst wildfire season in history, according to the World Meteorological Organisation, with more than 74,000 acres burned.
More than 50 fires broke out in July fueled by "exceptionally hot" conditions and precipitation at unusually low levels. The WMO said parts of southern Sweden are experiencing the driest summer on record.
And the Kvikkjokk-Arrenjarka weather station, which sits on the same latitude as northern Alaska, reported a record high of 90.5 degrees last month.