| Month | CET | Anomaly | notes |
| January | 4.0 | 0.2 | |
| February | 6.2 | 2.4 | |
| March | 8.8 | 3.1 | |
| April | 8.9 | 1.1 | |
| May | 13.3 | 2.1 | |
| June | 16.0 | 1.9 | |
| July | 16.9 | 0.9 | |
| August | 15.7 | 0.0 | |
| September | 13.6 | 0.0 | |
| October | 12.2 | 1.7 | |
| November | 6.8 | 0.3 | |
| December | 4.7 | 0.2 |
Average for 2017: 10.61, anomaly: 1.14C
Daily CET graph
