| 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 |
| 1987. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 54.4 | 7.9 | 1987-01-30 | 20 | 1 |
| February | 82.7 | 9.5 | 1987-02-24 | 14 | 3 |
| March | 135.5 | 10.1 | 1987-03-24 | 11 | 2 |
| April | 210.6 | 13.2 | 1987-04-30 | 7 | 7 |
| May | 183.2 | 12.7 | 1987-05-01 | 12 | 2 |
| June | 270.6 | 14.1 | 1987-06-30 | 1 | 6 |
| July | 375.0 | 15.0 | 1987-07-12 | 1 | 19 |
| August | 224.6 | 13.7 | 1987-08-11 | 5 | 7 |
| September | 215.5 | 12.0 | 1987-09-01 | 2 | 3 |
| October | 177.3 | 10.1 | 1987-10-03 | 8 | 7 |
| November | 42.6 | 7.2 | 1987-11-01 | 21 | 0 |
| December | 50.1 | 7.1 | 1987-12-09 | 20 | 1 |