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
1937.m_ssm_sxm_sxdm_dsf20m_dsf80
January84.77.81937-01-11142
February66.68.91937-02-24161
March95.29.11937-03-26170
April150.212.01937-04-19132
May299.114.61937-05-31111
June303.114.71937-06-10314
July302.514.21937-07-0219
August248.613.21937-08-0948
September208.212.11937-09-0262
October158.79.21937-10-1074
November51.88.11937-11-01213
December39.96.21937-12-05220