| 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 |
| 1990. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 61.8 | 7.2 | 1990-01-27 | 19 | 0 |
| February | 166.8 | 9.6 | 1990-02-17 | 7 | 11 |
| March | 184.5 | 11.1 | 1990-03-17 | 9 | 8 |
| April | 183.7 | 11.2 | 1990-04-01 | 8 | 3 |
| May | 260.6 | 14.6 | 1990-05-30 | 5 | 3 |
| June | 249.2 | 14.0 | 1990-06-28 | 4 | 8 |
| July | 316.5 | 13.9 | 1990-07-12 | 2 | 11 |
| August | 315.9 | 13.7 | 1990-08-04 | 3 | 21 |
| September | 180.3 | 11.1 | 1990-09-17 | 6 | 5 |
| October | 195.5 | 9.9 | 1990-10-04 | 7 | 13 |
| November | 33.9 | 8.3 | 1990-11-05 | 24 | 1 |
| December | 39.6 | 6.0 | 1990-12-03 | 21 | 0 |