| 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 |
| 1980. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 51.6 | 8.9 | 1980-01-28 | 22 | 2 |
| February | 81.6 | 7.9 | 1980-02-22 | 14 | 1 |
| March | 124.0 | 10.4 | 1980-03-05 | 12 | 2 |
| April | 143.2 | 13.0 | 1980-04-15 | 14 | 4 |
| May | 184.3 | 14.1 | 1980-05-12 | 12 | 7 |
| June | 255.1 | 15.4 | 1980-06-12 | 3 | 8 |
| July | 260.7 | 14.6 | 1980-07-06 | 5 | 7 |
| August | 252.2 | 13.5 | 1980-08-03 | 7 | 12 |
| September | 204.1 | 11.7 | 1980-09-04 | 7 | 6 |
| October | 146.1 | 10.0 | 1980-10-20 | 10 | 6 |
| November | 87.2 | 8.4 | 1980-11-17 | 16 | 5 |
| December | 78.5 | 7.7 | 1980-12-09 | 18 | 2 |