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
1957.m_ssm_sxm_sxdm_dsf20m_dsf80
January51.47.51957-01-29220
February77.49.21957-02-26162
March165.410.71957-03-2894
April192.612.31957-04-2799
May157.213.71957-05-18154
June331.815.01957-06-17110
July267.714.31957-07-05511
August281.613.11957-08-17212
September186.011.11957-09-0875
October155.69.61957-10-0385
November55.87.01957-11-30180
December48.57.31957-12-01201