| 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 |
| 1990. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 70.2 | 8.2 | 1990-01-22 | 18 | 4 |
| February | 167.5 | 9.7 | 1990-02-25 | 4 | 9 |
| March | 183.0 | 10.6 | 1990-03-18 | 9 | 8 |
| April | 160.8 | 12.1 | 1990-04-14 | 9 | 2 |
| May | 267.2 | 13.5 | 1990-05-05 | 6 | 8 |
| June | 215.5 | 13.8 | 1990-06-20 | 7 | 2 |
| July | 287.1 | 14.2 | 1990-07-05 | 5 | 11 |
| August | 311.6 | 13.4 | 1990-08-03 | 2 | 15 |
| September | 143.1 | 10.5 | 1990-09-17 | 8 | 1 |
| October | 147.2 | 9.4 | 1990-10-11 | 8 | 4 |
| November | 51.4 | 7.0 | 1990-11-10 | 21 | 0 |
| December | 35.0 | 7.2 | 1990-12-03 | 23 | 1 |