| 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 |
| 1991. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 96.7 | 8.2 | 1991-01-17 | 15 | 4 |
| February | 116.4 | 8.9 | 1991-02-23 | 9 | 4 |
| March | 83.4 | 8.7 | 1991-03-15 | 18 | 0 |
| April | 150.7 | 10.7 | 1991-04-15 | 7 | 0 |
| May | 197.7 | 14.2 | 1991-05-29 | 7 | 1 |
| June | 239.5 | 13.8 | 1991-06-20 | 5 | 7 |
| July | 255.7 | 14.2 | 1991-07-06 | 4 | 5 |
| August | 222.1 | 12.6 | 1991-08-07 | 5 | 7 |
| September | 190.6 | 11.3 | 1991-09-10 | 6 | 5 |
| October | 134.2 | 10.5 | 1991-10-03 | 11 | 6 |
| November | 65.2 | 7.6 | 1991-11-18 | 17 | 1 |
| December | 83.4 | 7.4 | 1991-12-15 | 14 | 1 |