| 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 |
| 1989. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 47.3 | 7.2 | 1989-01-02 | 21 | 1 |
| February | 64.4 | 8.5 | 1989-02-12 | 18 | 1 |
| March | 159.7 | 11.2 | 1989-03-27 | 10 | 8 |
| April | 148.7 | 12.0 | 1989-04-19 | 10 | 2 |
| May | 204.3 | 13.1 | 1989-05-12 | 7 | 4 |
| June | 199.8 | 13.6 | 1989-06-10 | 7 | 2 |
| July | 297.1 | 14.4 | 1989-07-08 | 1 | 8 |
| August | 210.1 | 12.8 | 1989-08-17 | 8 | 3 |
| September | 173.7 | 11.1 | 1989-09-13 | 7 | 4 |
| October | 184.8 | 9.7 | 1989-10-17 | 5 | 6 |
| November | 98.0 | 8.0 | 1989-11-05 | 11 | 4 |
| December | 60.0 | 6.4 | 1989-12-11 | 18 | 0 |