| 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 |
| 1964. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 50.3 | 8.0 | 1964-01-28 | 20 | 2 |
| February | 94.4 | 9.8 | 1964-02-22 | 17 | 7 |
| March | 76.0 | 9.4 | 1964-03-01 | 18 | 2 |
| April | 213.3 | 13.3 | 1964-04-26 | 7 | 9 |
| May | 279.6 | 14.7 | 1964-05-20 | 5 | 10 |
| June | 323.5 | 14.7 | 1964-06-11 | 1 | 9 |
| July | 343.6 | 14.6 | 1964-07-15 | 1 | 18 |
| August | 267.2 | 13.0 | 1964-08-06 | 3 | 13 |
| September | 188.5 | 11.7 | 1964-09-05 | 7 | 7 |
| October | 128.5 | 10.8 | 1964-10-04 | 12 | 5 |
| November | 74.8 | 8.5 | 1964-11-01 | 18 | 2 |
| December | 21.0 | 7.0 | 1964-12-23 | 27 | 1 |