| 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 | 65.4 | 7.6 | 1940-01-14 | 20 | 1 |
| February | 100.7 | 9.1 | 1940-02-21 | 12 | 5 |
| March | 121.7 | 9.4 | 1940-03-12 | 9 | 1 |
| April | 193.9 | 12.3 | 1940-04-23 | 10 | 6 |
| May | 158.6 | 14.2 | 1940-05-25 | 14 | 2 |
| June | 268.0 | 14.2 | 1940-06-09 | 3 | 5 |
| July | 249.3 | 15.0 | 1940-07-06 | 6 | 6 |
| August | 226.4 | 13.7 | 1940-08-09 | 7 | 8 |
| September | 151.0 | 10.9 | 1940-09-08 | 9 | 2 |
| October | 99.8 | 9.0 | 1940-10-18 | 18 | 4 |
| November | 64.0 | 8.0 | 1940-11-05 | 18 | 1 |
| December | 76.4 | 6.5 | 1940-12-02 | 14 | 0 |