| 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 | 66.4 | 8.5 | 1987-01-30 | 18 | 3 |
| February | 87.9 | 10.0 | 1987-02-24 | 14 | 2 |
| March | 130.5 | 10.8 | 1987-03-23 | 13 | 3 |
| April | 182.3 | 13.2 | 1987-04-28 | 11 | 7 |
| May | 145.9 | 13.4 | 1987-05-10 | 14 | 1 |
| June | 226.1 | 14.1 | 1987-06-30 | 7 | 6 |
| July | 310.0 | 14.7 | 1987-07-07 | 4 | 13 |
| August | 188.8 | 12.5 | 1987-08-23 | 6 | 4 |
| September | 184.3 | 11.5 | 1987-09-07 | 5 | 4 |
| October | 112.3 | 9.9 | 1987-10-01 | 12 | 1 |
| November | 47.2 | 7.0 | 1987-11-06 | 22 | 0 |
| December | 65.3 | 6.9 | 1987-12-23 | 18 | 1 |