| 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 | 60.0 | 8.1 | 1980-01-28 | 18 | 2 |
| February | 71.7 | 8.8 | 1980-02-20 | 16 | 2 |
| March | 110.5 | 9.2 | 1980-03-06 | 15 | 1 |
| April | 143.0 | 12.9 | 1980-04-16 | 16 | 4 |
| May | 209.6 | 14.9 | 1980-05-23 | 11 | 6 |
| June | 191.4 | 14.8 | 1980-06-12 | 8 | 3 |
| July | 206.9 | 14.0 | 1980-07-16 | 10 | 4 |
| August | 264.3 | 12.8 | 1980-08-03 | 3 | 11 |
| September | 206.4 | 11.2 | 1980-09-04 | 5 | 6 |
| October | 111.9 | 8.8 | 1980-10-17 | 12 | 3 |
| November | 75.8 | 8.9 | 1980-11-01 | 17 | 2 |
| December | 36.7 | 5.8 | 1980-12-23 | 21 | 0 |