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
1921.m_ssm_sxm_sxdm_dsf20m_dsf80
January73.78.01921-01-25153
February91.38.81921-02-19141
March225.110.01921-03-2543
April165.011.61921-04-13114
May304.014.81921-05-24311
June264.815.21921-06-08712
July336.214.41921-07-07113
August284.813.81921-08-06415
September222.110.31921-09-0143
October211.49.01921-10-0757
November32.07.51921-11-01230
December27.86.41921-12-22240