| Month | CET | Anomaly | notes |
| January | 1.5 | 0.3 | |
| February | 1.4 | 0.4 | |
| March | 2.9 | 0.7 | |
| April | 4.1 | 0.2 | |
| May | 6.9 | 0.2 | |
| June | 9.1 | -0.5 | |
| July | 11.4 | -0.2 | |
| August | 11.9 | 0.5 | |
| September | 8.3 | -1.3 | |
| October | 7.4 | 0.3 | |
| November | 6.7 | 3.1 | |
| December | 7.0 | 5.1 |
Average for 2015: 6.59, anomaly: 0.74C
Daily CET graph
