| 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 |
| 1983. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 69.8 | 7.7 | 1983-01-12 | 19 | 1 |
| February | 92.2 | 9.2 | 1983-02-26 | 14 | 5 |
| March | 153.8 | 10.3 | 1983-03-28 | 12 | 7 |
| April | 206.0 | 12.2 | 1983-04-30 | 5 | 3 |
| May | 258.0 | 13.3 | 1983-05-18 | 4 | 6 |
| June | 236.0 | 13.7 | 1983-06-08 | 6 | 8 |
| July | 298.9 | 13.4 | 1983-07-23 | 2 | 9 |
| August | 245.9 | 13.0 | 1983-08-16 | 4 | 9 |
| September | 221.8 | 11.5 | 1983-09-01 | 6 | 9 |
| October | 194.5 | 10.2 | 1983-10-13 | 7 | 10 |
| November | 103.2 | 8.4 | 1983-11-02 | 14 | 5 |
| December | 72.3 | 7.4 | 1983-12-29 | 17 | 1 |