Description of elements in the header
m_ssamount of monthly sunshine duration
m_sxthe maximum sunshine duration in the month
m_sxdthe day with the maximum sunshine duration
m_dsf20number of days when the sunshine duration is less than 20 % of the astronomic sunshine duration
m_dsf80number of days when the sunshine duration is more than 80 % of the astronomic sunshine duration
1940.m_ssm_sxm_sxdm_dsf20m_dsf80
January61.67.31940-01-02202
February102.79.11940-02-25133
March141.69.81940-03-17112
April193.612.31940-04-1985
May168.214.11940-05-26154
June185.114.01940-06-1183
July311.914.11940-07-03210
August252.313.21940-08-1057
September172.511.51940-09-0482
October104.78.91940-10-17162
November69.88.61940-11-05172
December54.06.41940-12-01180