| Description of elements in the header | |
|---|---|
| m_ss | amount of monthly sunshine duration |
| m_sx | the maximum sunshine duration in the month |
| m_sxd | the day with the maximum sunshine duration |
| m_dsf20 | number of days when the sunshine duration is less than 20 % of the astronomic sunshine duration |
| m_dsf80 | number of days when the sunshine duration is more than 80 % of the astronomic sunshine duration |
| 1939. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 67.4 | 7.5 | 1939-01-09 | 18 | 2 |
| February | 130.7 | 9.1 | 1939-02-15 | 8 | 2 |
| March | 104.9 | 9.6 | 1939-03-31 | 15 | 0 |
| April | 239.2 | 12.7 | 1939-04-27 | 4 | 9 |
| May | 167.0 | 13.4 | 1939-05-17 | 12 | 2 |
| June | 295.1 | 15.1 | 1939-06-29 | 4 | 10 |
| July | 357.2 | 14.3 | 1939-07-16 | 0 | 17 |
| August | 250.5 | 13.6 | 1939-08-07 | 4 | 9 |
| September | 241.7 | 12.0 | 1939-09-02 | 0 | 9 |
| October | 86.9 | 9.0 | 1939-10-25 | 17 | 1 |
| November | 45.2 | 8.9 | 1939-11-08 | 23 | 2 |
| December | 81.3 | 7.8 | 1939-12-22 | 15 | 5 |