| 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 | 58.7 | 8.6 | 1987-01-30 | 20 | 1 |
| February | 94.1 | 9.9 | 1987-02-25 | 15 | 4 |
| March | 143.4 | 9.9 | 1987-03-24 | 10 | 2 |
| April | 210.5 | 13.0 | 1987-04-29 | 9 | 10 |
| May | 205.7 | 13.4 | 1987-05-10 | 10 | 8 |
| June | 244.9 | 14.2 | 1987-06-06 | 5 | 6 |
| July | 347.1 | 14.3 | 1987-07-07 | 0 | 19 |
| August | 255.7 | 12.8 | 1987-08-06 | 3 | 7 |
| September | 242.5 | 10.7 | 1987-09-02 | 2 | 6 |
| October | 145.7 | 9.8 | 1987-10-04 | 10 | 5 |
| November | 60.8 | 8.4 | 1987-11-05 | 20 | 1 |
| December | 62.5 | 7.7 | 1987-12-30 | 22 | 5 |