| 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 | 53.9 | 6.8 | 1990-01-27 | 19 | 0 |
| February | 156.4 | 9.8 | 1990-02-23 | 7 | 7 |
| March | 201.1 | 10.8 | 1990-03-18 | 4 | 6 |
| April | 170.9 | 11.6 | 1990-04-02 | 6 | 3 |
| May | 263.4 | 14.0 | 1990-05-20 | 4 | 4 |
| June | 243.4 | 14.0 | 1990-06-01 | 5 | 5 |
| July | 304.4 | 14.9 | 1990-07-12 | 2 | 9 |
| August | 307.5 | 13.6 | 1990-08-05 | 4 | 19 |
| September | 185.0 | 11.4 | 1990-09-04 | 3 | 3 |
| October | 189.4 | 10.1 | 1990-10-04 | 7 | 10 |
| November | 22.5 | 4.2 | 1990-11-05 | 25 | 0 |
| December | 49.9 | 7.1 | 1990-12-26 | 21 | 2 |