| 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 |
| 1957. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 87.4 | 8.2 | 1957-01-29 | 15 | 4 |
| February | 71.3 | 7.4 | 1957-02-22 | 14 | 0 |
| March | 151.1 | 9.9 | 1957-03-27 | 7 | 1 |
| April | 173.8 | 13.0 | 1957-04-23 | 13 | 9 |
| May | 203.6 | 14.1 | 1957-05-15 | 10 | 6 |
| June | 291.3 | 14.9 | 1957-06-10 | 3 | 10 |
| July | 216.3 | 14.1 | 1957-07-04 | 10 | 5 |
| August | 254.2 | 13.5 | 1957-08-03 | 3 | 9 |
| September | 148.8 | 11.9 | 1957-09-08 | 10 | 5 |
| October | 162.7 | 9.5 | 1957-10-05 | 7 | 5 |
| November | 52.5 | 7.6 | 1957-11-05 | 20 | 0 |
| December | 43.7 | 7.5 | 1957-12-01 | 23 | 2 |