| 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 | 51.0 | 7.5 | 1930-01-06 | 21 | 2 |
| February | 119.4 | 8.2 | 1930-02-09 | 10 | 1 |
| March | 104.2 | 9.2 | 1930-03-31 | 16 | 0 |
| April | 148.2 | 12.2 | 1930-04-20 | 15 | 3 |
| May | 236.8 | 13.7 | 1930-05-18 | 3 | 4 |
| June | 277.3 | 14.3 | 1930-06-13 | 4 | 6 |
| July | 247.8 | 14.3 | 1930-07-03 | 6 | 7 |
| August | 257.1 | 13.6 | 1930-08-04 | 6 | 12 |
| September | 131.7 | 11.4 | 1930-09-01 | 11 | 1 |
| October | 87.6 | 8.8 | 1930-10-14 | 17 | 1 |
| November | 112.1 | 7.7 | 1930-11-14 | 11 | 1 |
| December | 15.7 | 4.3 | 1930-12-01 | 27 | 0 |