| 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 |
| 1971. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 54.9 | 6.3 | 1971-01-25 | 18 | 0 |
| February | 93.1 | 8.1 | 1971-02-13 | 11 | 0 |
| March | 93.4 | 10.3 | 1971-03-25 | 16 | 1 |
| April | 196.4 | 12.1 | 1971-04-21 | 9 | 6 |
| May | 265.0 | 13.7 | 1971-05-26 | 6 | 12 |
| June | 249.3 | 14.4 | 1971-06-14 | 2 | 3 |
| July | 280.7 | 14.3 | 1971-07-09 | 3 | 5 |
| August | 300.9 | 13.1 | 1971-08-11 | 3 | 15 |
| September | 173.7 | 9.9 | 1971-09-04 | 8 | 2 |
| October | 196.6 | 10.0 | 1971-10-09 | 6 | 7 |
| November | 58.1 | 9.1 | 1971-11-05 | 20 | 3 |
| December | 68.3 | 7.1 | 1971-12-24 | 18 | 2 |