| 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 | 110.5 | 8.1 | 1981-01-27 | 10 | 3 |
| February | 107.8 | 9.1 | 1981-02-06 | 12 | 5 |
| March | 172.4 | 10.9 | 1981-03-28 | 8 | 2 |
| April | 227.2 | 12.4 | 1981-04-22 | 4 | 6 |
| May | 229.4 | 13.7 | 1981-05-19 | 6 | 7 |
| June | 245.0 | 13.6 | 1981-06-02 | 5 | 7 |
| July | 291.9 | 13.8 | 1981-07-02 | 1 | 9 |
| August | 271.9 | 12.7 | 1981-08-16 | 1 | 9 |
| September | 167.1 | 10.5 | 1981-09-08 | 9 | 3 |
| October | 147.5 | 9.8 | 1981-10-09 | 9 | 3 |
| November | 87.7 | 7.6 | 1981-11-05 | 13 | 1 |
| December | 45.4 | 7.1 | 1981-12-27 | 21 | 1 |