| 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 | 39.3 | 7.7 | 1939-01-24 | 22 | 1 |
| February | 88.9 | 8.7 | 1939-02-01 | 14 | 2 |
| March | 110.0 | 9.1 | 1939-03-12 | 16 | 0 |
| April | 247.8 | 12.9 | 1939-04-27 | 2 | 8 |
| May | 216.2 | 14.0 | 1939-05-17 | 4 | 3 |
| June | 333.6 | 15.0 | 1939-06-07 | 1 | 13 |
| July | 344.8 | 14.7 | 1939-07-01 | 1 | 16 |
| August | 267.4 | 13.4 | 1939-08-05 | 4 | 12 |
| September | 211.7 | 12.7 | 1939-09-04 | 6 | 12 |
| October | 74.8 | 8.7 | 1939-10-01 | 19 | 0 |
| November | 79.7 | 8.3 | 1939-11-09 | 17 | 3 |
| December | 77.4 | 7.7 | 1939-12-28 | 16 | 4 |