First of all those Kaisaniemi normals have been been there for years from several different sources Don t you think they are more informative than only records from a 30 year period Almost all other climate boxes have all time records Secondly the Helsinki Vantaa sunshine stats were correct Now when you changed them they show Kouvola Utti s sunshine Page 68 column 301 Thirdly there is no annual mean temp classifying which is a subarctic climate and which not In the K ppen qualification the requirements are 3 or less months with a mean temp of over 10C and the coldest month below 3C Winnipeg has a annual mean of 3C and it s nowhere near the subarctic classification as it too has 5 months with a mean temp above 10C Your percent possible sunshine calculations are totally wrong Helsinki has on the 16th of July roughly 18 hours of daylight some 540 hours You have put 280 hours in the July box 280 540 52 You claim 75 As you can see Winnipeg has 400 hours of more sunshine annually and it has 50 6 possible sunshine Please revert the to the data and discard your changes as they are wrong and have only done harm