| 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 | 101.9 | 7.5 | 1964-01-23 | 13 | 3 |
| February | 110.9 | 9.0 | 1964-02-21 | 11 | 2 |
| March | 67.9 | 10.0 | 1964-03-17 | 19 | 1 |
| April | 174.9 | 13.5 | 1964-04-27 | 10 | 7 |
| May | 217.2 | 13.7 | 1964-05-23 | 8 | 5 |
| June | 268.3 | 15.1 | 1964-06-12 | 4 | 9 |
| July | 301.7 | 14.8 | 1964-07-03 | 4 | 10 |
| August | 227.9 | 13.2 | 1964-08-07 | 7 | 10 |
| September | 198.2 | 11.1 | 1964-09-04 | 8 | 8 |
| October | 95.4 | 10.1 | 1964-10-05 | 17 | 3 |
| November | 56.0 | 7.5 | 1964-11-15 | 20 | 2 |
| December | 20.8 | 5.7 | 1964-12-31 | 26 | 0 |