| Month | CET | Anomaly | notes |
| January | 0.4 | -0.8 | |
| February | 2.3 | 1.4 | |
| March | 3.7 | 1.5 | |
| April | 1.3 | -2.6 | |
| May | 5.9 | -0.8 | |
| June | 11.0 | 1.4 | |
| July | 13.3 | 1.7 | |
| August | 12.1 | 0.7 | |
| September | 11.7 | 2.1 | |
| October | 8.9 | 1.8 | |
| November | 4.1 | 0.6 | |
| December | 4.0 | 2.1 |
Average for 2021: 6.6, anomaly: 0.75C
Daily CET graph
