| 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 | 86.7 | 8.5 | 1991-01-31 | 15 | 2 |
| February | 89.6 | 8.1 | 1991-02-01 | 13 | 1 |
| March | 92.3 | 10.3 | 1991-03-24 | 17 | 1 |
| April | 199.2 | 12.0 | 1991-04-22 | 6 | 2 |
| May | 156.4 | 11.1 | 1991-05-23 | 15 | 0 |
| June | 288.0 | 14.2 | 1991-06-23 | 3 | 9 |
| July | 234.1 | 13.8 | 1991-07-06 | 8 | 7 |
| August | 260.4 | 12.9 | 1991-08-11 | 4 | 11 |
| September | 226.6 | 12.0 | 1991-09-02 | 3 | 9 |
| October | 157.4 | 10.6 | 1991-10-04 | 9 | 5 |
| November | 69.4 | 8.0 | 1991-11-07 | 18 | 1 |
| December | 57.2 | 5.1 | 1991-12-02 | 16 | 0 |