| 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 |
| 1930. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 39.4 | 7.8 | 1930-01-27 | 25 | 1 |
| February | 116.0 | 9.0 | 1930-02-11 | 11 | 4 |
| March | 149.2 | 10.4 | 1930-03-22 | 11 | 4 |
| April | 182.5 | 12.4 | 1930-04-28 | 7 | 5 |
| May | 280.4 | 14.2 | 1930-05-30 | 5 | 10 |
| June | 332.2 | 14.9 | 1930-06-09 | 2 | 12 |
| July | 322.0 | 14.7 | 1930-07-04 | 2 | 13 |
| August | 310.6 | 14.8 | 1930-08-02 | 4 | 19 |
| September | 171.1 | 12.8 | 1930-09-01 | 4 | 2 |
| October | 126.9 | 9.6 | 1930-10-03 | 13 | 3 |
| November | 139.4 | 8.7 | 1930-11-10 | 9 | 8 |
| December | 24.6 | 5.1 | 1930-12-09 | 25 | 0 |