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
1918.m_ssm_sxm_sxdm_dsf20m_dsf80
January77.87.01918-01-04111
February84.68.61918-02-26130
March145.610.01918-03-2491
April159.412.71918-04-2982
May247.414.61918-05-23811
June266.113.91918-06-1655
July245.914.11918-07-1676
August232.713.31918-08-0168
September218.512.31918-09-0168
October101.98.11918-10-20140
November45.07.41918-11-13231
December31.85.51918-12-14240