| 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 | 70.3 | 7.6 | 1940-01-14 | 18 | 2 |
| February | 115.7 | 8.8 | 1940-02-23 | 13 | 2 |
| March | 145.2 | 10.0 | 1940-03-16 | 10 | 2 |
| April | 189.3 | 12.8 | 1940-04-24 | 8 | 5 |
| May | 143.0 | 13.8 | 1940-05-26 | 16 | 1 |
| June | 196.7 | 14.0 | 1940-06-09 | 8 | 2 |
| July | 286.5 | 14.9 | 1940-07-14 | 3 | 8 |
| August | 264.6 | 13.5 | 1940-08-10 | 5 | 10 |
| September | 186.0 | 11.2 | 1940-09-01 | 8 | 4 |
| October | 147.1 | 10.2 | 1940-10-19 | 11 | 5 |
| November | 67.3 | 8.8 | 1940-11-05 | 19 | 3 |
| December | 67.7 | 8.0 | 1940-12-02 | 18 | 2 |