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
1930.m_ssm_sxm_sxdm_dsf20m_dsf80
January35.46.71930-01-27240
February132.69.21930-02-2096
March158.211.01930-03-3183
April183.912.51930-04-2785
May269.213.61930-05-1748
June373.814.91930-06-07119
July329.915.31930-07-03215
August293.914.01930-08-01415
September192.311.51930-09-0165
October133.29.31930-10-03145
November107.78.21930-11-18104
December30.76.61930-12-16240