| 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 | 45.1 | 6.4 | 1999-01-30 | 22 | 0 |
| February | 94.7 | 10.1 | 1999-02-27 | 14 | 3 |
| March | 135.8 | 9.7 | 1999-03-26 | 10 | 1 |
| April | 160.7 | 10.9 | 1999-04-06 | 11 | 1 |
| May | 211.1 | 13.2 | 1999-05-24 | 7 | 3 |
| June | 234.4 | 13.7 | 1999-06-05 | 5 | 6 |
| July | 236.7 | 13.1 | 1999-07-19 | 7 | 5 |
| August | 190.8 | 12.0 | 1999-08-01 | 8 | 2 |
| September | 185.8 | 11.1 | 1999-09-13 | 9 | 5 |
| October | 125.5 | 9.4 | 1999-10-03 | 11 | 4 |
| November | 42.0 | 7.9 | 1999-11-20 | 22 | 1 |
| December | 74.6 | 7.6 | 1999-12-06 | 17 | 1 |