| 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 | 48.6 | 7.6 | 1999-01-18 | 22 | 2 |
| February | 82.3 | 9.4 | 1999-02-28 | 15 | 2 |
| March | 195.6 | 11.1 | 1999-03-25 | 4 | 6 |
| April | 194.3 | 12.5 | 1999-04-15 | 7 | 4 |
| May | 263.0 | 14.1 | 1999-05-28 | 5 | 9 |
| June | 248.1 | 14.5 | 1999-06-26 | 5 | 6 |
| July | 280.5 | 14.7 | 1999-07-05 | 3 | 9 |
| August | 283.0 | 13.1 | 1999-08-04 | 2 | 6 |
| September | 230.8 | 11.6 | 1999-09-06 | 2 | 8 |
| October | 140.4 | 9.5 | 1999-10-03 | 11 | 5 |
| November | 57.9 | 8.2 | 1999-11-03 | 22 | 2 |
| December | 64.5 | 7.5 | 1999-12-23 | 19 | 4 |