| 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 | 63.3 | 7.7 | 1999-01-14 | 21 | 1 |
| February | 106.2 | 9.9 | 1999-02-25 | 13 | 4 |
| March | 151.5 | 11.1 | 1999-03-25 | 11 | 2 |
| April | 184.2 | 12.4 | 1999-04-19 | 10 | 5 |
| May | 241.7 | 14.2 | 1999-05-28 | 6 | 7 |
| June | 218.1 | 14.2 | 1999-06-06 | 8 | 4 |
| July | 281.5 | 14.0 | 1999-07-18 | 4 | 12 |
| August | 272.2 | 12.9 | 1999-08-02 | 4 | 9 |
| September | 226.4 | 11.9 | 1999-09-06 | 5 | 8 |
| October | 153.0 | 9.8 | 1999-10-11 | 8 | 3 |
| November | 62.9 | 8.2 | 1999-11-01 | 19 | 1 |
| December | 62.0 | 7.2 | 1999-12-06 | 18 | 2 |