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
1913.m_ssm_sxm_sxdm_dsf20m_dsf80
January29.75.91913-01-28230
February85.57.41913-02-05110
March128.88.41913-03-2980
April148.211.31913-04-22101
May188.013.41913-05-2795
June243.713.31913-06-0662
July193.512.81913-07-1082
August199.212.21913-08-0571
September125.69.01913-09-1890
October156.18.01913-10-2260
November72.27.21913-11-10160
December56.95.51913-12-01160