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
1937.m_ssm_sxm_sxdm_dsf20m_dsf80
January68.76.81937-01-17180
February75.39.31937-02-15152
March119.59.81937-03-22132
April151.512.71937-04-20113
May321.014.01937-05-20112
June278.514.91937-06-10612
July321.715.21937-07-03215
August239.612.81937-08-1059
September236.711.31937-09-0328
October180.49.71937-10-2299
November57.58.81937-11-01212
December24.35.41937-12-22260