| 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 |
| 1999. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 61.8 | 7.5 | 1999-01-07 | 20 | 3 |
| February | 97.9 | 9.5 | 1999-02-27 | 14 | 3 |
| March | 155.8 | 10.6 | 1999-03-25 | 6 | 3 |
| April | 166.8 | 11.8 | 1999-04-29 | 9 | 4 |
| May | 251.3 | 12.9 | 1999-05-29 | 6 | 6 |
| June | 262.9 | 13.7 | 1999-06-27 | 6 | 9 |
| July | 258.7 | 13.4 | 1999-07-04 | 5 | 10 |
| August | 255.7 | 12.6 | 1999-08-03 | 6 | 9 |
| September | 214.2 | 10.8 | 1999-09-12 | 3 | 7 |
| October | 153.2 | 9.2 | 1999-10-11 | 8 | 3 |
| November | 38.9 | 8.5 | 1999-11-01 | 23 | 1 |
| December | 77.3 | 7.6 | 1999-12-06 | 18 | 3 |