| Month | CET | Anomaly | notes |
| January | 1.1 | 0.0 | |
| February | 3.8 | 2.8 | |
| March | 5.1 | 2.9 | |
| April | 4.6 | 0.7 | |
| May | 8.7 | 2.0 | |
| June | 11.8 | 2.1 | |
| July | 12.5 | 0.9 | |
| August | 11.6 | 0.2 | |
| September | 9.8 | 0.3 | |
| October | 9.2 | 2.1 | |
| November | 3.5 | 0.0 | |
| December | 2.0 | 0.1 |
Average for 2017: 7.01, anomaly: 1.16C
Daily CET graph
