| 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 | 15.5 | 7.7 | 1989-01-02 | 28 | 1 |
| February | 57.4 | 9.3 | 1989-02-22 | 18 | 2 |
| March | 168.7 | 11.4 | 1989-03-27 | 9 | 6 |
| April | 167.0 | 12.5 | 1989-04-19 | 10 | 5 |
| May | 251.7 | 14.0 | 1989-05-23 | 4 | 7 |
| June | 191.7 | 13.8 | 1989-06-08 | 9 | 1 |
| July | 308.5 | 14.7 | 1989-07-05 | 1 | 8 |
| August | 220.1 | 12.3 | 1989-08-14 | 9 | 6 |
| September | 206.3 | 11.6 | 1989-09-13 | 6 | 8 |
| October | 152.5 | 9.2 | 1989-10-24 | 10 | 3 |
| November | 114.9 | 8.5 | 1989-11-12 | 10 | 6 |
| December | 79.1 | 7.5 | 1989-12-08 | 14 | 2 |