| 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 |
| 1921. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 60.2 | 8.0 | 1921-01-25 | 20 | 2 |
| February | 102.0 | 9.6 | 1921-02-23 | 13 | 5 |
| March | 214.8 | 10.0 | 1921-03-29 | 5 | 5 |
| April | 215.9 | 12.5 | 1921-04-29 | 5 | 8 |
| May | 300.3 | 14.3 | 1921-05-24 | 1 | 10 |
| June | 236.6 | 14.8 | 1921-06-08 | 7 | 8 |
| July | 321.7 | 13.9 | 1921-07-09 | 1 | 15 |
| August | 278.0 | 13.0 | 1921-08-03 | 4 | 16 |
| September | 225.7 | 10.8 | 1921-09-07 | 2 | 1 |
| October | 185.6 | 9.2 | 1921-10-06 | 4 | 2 |
| November | 50.4 | 8.1 | 1921-11-01 | 21 | 2 |
| December | 41.6 | 7.3 | 1921-12-12 | 23 | 1 |