| 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 | 96.6 | 8.1 | 1957-01-09 | 14 | 2 |
| February | 112.5 | 8.7 | 1957-02-10 | 9 | 2 |
| March | 191.5 | 10.8 | 1957-03-28 | 7 | 7 |
| April | 173.6 | 12.8 | 1957-04-27 | 10 | 4 |
| May | 164.0 | 14.0 | 1957-05-10 | 12 | 3 |
| June | 343.5 | 15.3 | 1957-06-15 | 1 | 11 |
| July | 283.3 | 14.6 | 1957-07-05 | 5 | 12 |
| August | 278.2 | 13.5 | 1957-08-03 | 4 | 15 |
| September | 180.7 | 10.8 | 1957-09-09 | 7 | 4 |
| October | 156.0 | 9.9 | 1957-10-19 | 11 | 9 |
| November | 81.1 | 8.7 | 1957-11-01 | 14 | 2 |
| December | 45.5 | 6.7 | 1957-12-02 | 21 | 0 |