| 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 | 82.3 | 8.0 | 1940-01-11 | 18 | 6 |
| February | 100.2 | 9.0 | 1940-02-27 | 15 | 1 |
| March | 130.5 | 10.6 | 1940-03-31 | 13 | 2 |
| April | 239.5 | 13.2 | 1940-04-24 | 5 | 12 |
| May | 201.5 | 14.6 | 1940-05-25 | 10 | 5 |
| June | 209.0 | 15.0 | 1940-06-09 | 7 | 2 |
| July | 325.6 | 15.0 | 1940-07-02 | 1 | 11 |
| August | 244.6 | 13.2 | 1940-08-08 | 4 | 10 |
| September | 180.9 | 10.3 | 1940-09-05 | 9 | 0 |
| October | 144.6 | 9.5 | 1940-10-18 | 13 | 8 |
| November | 59.0 | 8.0 | 1940-11-09 | 21 | 1 |
| December | 55.4 | 8.0 | 1940-12-02 | 20 | 2 |