| 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 |
| 1987. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 60.9 | 6.4 | 1987-01-31 | 18 | 0 |
| February | 91.8 | 10.0 | 1987-02-24 | 17 | 6 |
| March | 127.1 | 10.7 | 1987-03-21 | 12 | 2 |
| April | 181.5 | 12.9 | 1987-04-29 | 11 | 4 |
| May | 178.6 | 12.7 | 1987-05-10 | 9 | 3 |
| June | 241.0 | 14.5 | 1987-06-26 | 6 | 7 |
| July | 338.6 | 14.6 | 1987-07-06 | 0 | 13 |
| August | 256.8 | 12.8 | 1987-08-09 | 3 | 8 |
| September | 240.0 | 10.8 | 1987-09-14 | 1 | 8 |
| October | 170.6 | 10.2 | 1987-10-05 | 6 | 9 |
| November | 54.6 | 8.3 | 1987-11-05 | 18 | 1 |
| December | 63.3 | 6.5 | 1987-12-05 | 18 | 0 |