| Month | CET | Anomaly | notes |
| January | 8.3 | 1.8 | |
| February | 6.0 | -0.6 | |
| March | 8.3 | -0.8 | |
| April | 13.6 | 1.7 | |
| May | 18.8 | 3.2 | |
| June | 21.5 | 3.0 | |
| July | 25.5 | 5.1 | |
| August | 21.2 | 1.1 | |
| September | 18.0 | 0.5 | |
| October | 14.5 | 0.6 | |
| November | 11.1 | 1.8 | |
| December | 9.5 | 2.3 |
Average for 2018: 14.75, anomaly: 1.67C
Daily CET graph
