| Month | CET | Anomaly | notes |
| January | 7.5 | 1.1 | |
| February | 7.1 | 0.5 | |
| March | 10.2 | 1.1 | |
| April | 14.3 | 2.4 | |
| May | 14.8 | -0.8 | |
| June | 18.8 | 0.3 | |
| July | 20.7 | 0.3 | |
| August | 20.1 | 0.0 | |
| September | 17.1 | -0.4 | |
| October | 14.4 | 0.5 | |
| November | 12.3 | 2.9 | |
| December | 12.3 | 5.1 |
Average for 2015: 14.18, anomaly: 1.1C
Daily CET graph
