| 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 |
| 1997. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 31.8 | 7.1 | 1997-01-29 | 26 | 0 |
| February | 109.2 | 9.6 | 1997-02-28 | 11 | 3 |
| March | 210.0 | 10.8 | 1997-03-08 | 4 | 6 |
| April | 183.0 | 12.4 | 1997-04-14 | 10 | 4 |
| May | 268.2 | 13.9 | 1997-05-23 | 6 | 10 |
| June | 266.0 | 14.3 | 1997-06-28 | 3 | 8 |
| July | 221.7 | 14.0 | 1997-07-02 | 8 | 5 |
| August | 241.1 | 12.8 | 1997-08-11 | 5 | 7 |
| September | 260.3 | 11.4 | 1997-09-06 | 2 | 11 |
| October | 164.5 | 9.5 | 1997-10-06 | 8 | 6 |
| November | 68.4 | 8.6 | 1997-11-04 | 19 | 1 |
| December | 39.1 | 7.0 | 1997-12-30 | 22 | 1 |