The data show, according to Finnish Meteorological Institute, that over the past 50 years the Finnish climate has warmed up in every part of the country. At their highest, average monthly temperatures have increased by nearly two degrees Celsius.
Yle commissioned a study to confirm the faith and, therefore, the review period is only for 50 years and not one hundred years.
There it shows one exception to the monthly warming trend has been the month of June.
The further south in Finland one goes, the more the average temperature for the month of June has declined. The difference is not major though – no more than 0.4 degrees.
If we can to add bit more time further backward, has been there in the 1930's many warm June-months. If we do it, sorry but this hockey stick would turn the other way.