| 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 | 54.7 | 8.4 | 1980-01-28 | 19 | 1 |
| February | 59.6 | 8.6 | 1980-02-02 | 18 | 1 |
| March | 113.3 | 10.3 | 1980-03-31 | 12 | 2 |
| April | 127.1 | 13.0 | 1980-04-16 | 17 | 5 |
| May | 182.4 | 14.4 | 1980-05-12 | 9 | 4 |
| June | 256.3 | 13.6 | 1980-06-14 | 2 | 7 |
| July | 236.9 | 14.3 | 1980-07-16 | 8 | 7 |
| August | 259.0 | 13.7 | 1980-08-08 | 2 | 7 |
| September | 208.2 | 11.7 | 1980-09-04 | 4 | 8 |
| October | 127.5 | 9.3 | 1980-10-04 | 11 | 3 |
| November | 79.8 | 7.8 | 1980-11-17 | 16 | 1 |
| December | 57.3 | 7.2 | 1980-12-12 | 19 | 1 |