| 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 |
| 1940. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 48.1 | 7.3 | 1940-01-06 | 20 | 1 |
| February | 114.1 | 9.0 | 1940-02-28 | 13 | 1 |
| March | 162.9 | 10.4 | 1940-03-16 | 9 | 3 |
| April | 215.5 | 12.5 | 1940-04-22 | 6 | 9 |
| May | 200.6 | 14.1 | 1940-05-25 | 12 | 7 |
| June | 191.1 | 14.0 | 1940-06-11 | 8 | 2 |
| July | 337.8 | 14.7 | 1940-07-06 | 2 | 14 |
| August | 252.1 | 13.6 | 1940-08-10 | 5 | 9 |
| September | 213.9 | 11.1 | 1940-09-04 | 5 | 8 |
| October | 154.2 | 10.0 | 1940-10-18 | 11 | 9 |
| November | 74.6 | 8.9 | 1940-11-05 | 17 | 2 |
| December | 45.4 | 7.6 | 1940-12-02 | 21 | 1 |