| Month | CET | Anomaly | notes |
| January | 7.0 | 0.6 | |
| February | 8.9 | 2.2 | |
| March | 12.5 | 3.4 | |
| April | 13.5 | 1.7 | |
| May | 17.9 | 2.3 | |
| June | 20.4 | 1.8 | |
| July | 21.3 | 0.9 | |
| August | 19.9 | -0.2 | |
| September | 17.3 | -0.2 | |
| October | 15.3 | 1.4 | |
| November | 10.0 | 0.7 | |
| December | 7.5 | 0.4 |
Average for 2017: 14.33, anomaly: 1.25C
Daily CET graph
