| 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 |
| 1981. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 120.9 | 8.7 | 1981-01-30 | 7 | 4 |
| February | 115.1 | 9.6 | 1981-02-26 | 9 | 5 |
| March | 119.8 | 10.4 | 1981-03-27 | 12 | 2 |
| April | 209.0 | 12.6 | 1981-04-15 | 6 | 6 |
| May | 211.1 | 13.3 | 1981-05-07 | 8 | 4 |
| June | 225.5 | 13.9 | 1981-06-11 | 7 | 3 |
| July | 251.8 | 13.7 | 1981-07-05 | 6 | 3 |
| August | 230.1 | 12.1 | 1981-08-02 | 4 | 5 |
| September | 163.7 | 10.9 | 1981-09-06 | 7 | 6 |
| October | 135.7 | 9.1 | 1981-10-05 | 11 | 1 |
| November | 87.3 | 8.5 | 1981-11-08 | 15 | 1 |
| December | 32.7 | 5.3 | 1981-12-27 | 22 | 0 |