The chief St. Petersburg weather forecaster on his Facebook page summarized the results of the second May decade. Alexander Kolesov said that so warmly at this time in the city on the Neva for the whole history of observations was only three times. In 1975, the average decade-long temperature was + 18.7 ° C. In 2010, it was 18.1 ° C. This year is not much inferior to the record holders - 17.5 ° C.