| 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 | 59.9 | 7.5 | 1930-01-14 | 20 | 3 |
| February | 151.0 | 9.5 | 1930-02-25 | 8 | 10 |
| March | 155.7 | 9.2 | 1930-03-03 | 7 | 2 |
| April | 197.0 | 12.5 | 1930-04-24 | 8 | 5 |
| May | 249.4 | 13.2 | 1930-05-05 | 7 | 6 |
| June | 361.8 | 14.6 | 1930-06-13 | 1 | 20 |
| July | 328.9 | 15.0 | 1930-07-02 | 1 | 10 |
| August | 301.5 | 13.3 | 1930-08-02 | 2 | 16 |
| September | 200.9 | 11.1 | 1930-09-01 | 4 | 2 |
| October | 161.1 | 9.8 | 1930-10-03 | 9 | 7 |
| November | 99.4 | 8.3 | 1930-11-15 | 11 | 2 |
| December | 48.3 | 7.9 | 1930-12-04 | 22 | 3 |