All winters are cold and snowy in Finland, but some much more than others.
Weather station at Helsinki Airport in Vantaa.
"Cold days" are with maximum temperature below 0C.
"Snow days" are simply days with at least some snow on the ground.
Winters are shown such that e.g. "2010" on the graph means the winter of 2009/10 (e.g. November 2009 -- April 2010).
Source: Finnish Meteorological Institute.
