| 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 |
| 1981. | m_ss | m_sx | m_sxd | m_dsf20 | m_dsf80 |
|---|---|---|---|---|---|
| January | 89.2 | 7.2 | 1981-01-09 | 14 | 2 |
| February | 115.3 | 8.7 | 1981-02-09 | 10 | 1 |
| March | 151.9 | 10.5 | 1981-03-29 | 12 | 2 |
| April | 202.9 | 12.2 | 1981-04-15 | 6 | 6 |
| May | 214.5 | 13.0 | 1981-05-31 | 8 | 4 |
| June | 237.7 | 13.8 | 1981-06-27 | 4 | 4 |
| July | 268.7 | 13.8 | 1981-07-23 | 5 | 7 |
| August | 273.1 | 12.4 | 1981-08-07 | 1 | 8 |
| September | 158.7 | 10.0 | 1981-09-08 | 7 | 0 |
| October | 155.3 | 9.5 | 1981-10-08 | 8 | 7 |
| November | 73.1 | 8.6 | 1981-11-03 | 19 | 2 |
| December | 44.4 | 5.4 | 1981-12-17 | 22 | 0 |