| Month | CET | Anomaly | notes |
| January | 4.5 | 0.6 | |
| February | 3.9 | 0.1 | |
| March | 7.5 | 1.8 | |
| April | 9.6 | 1.7 | |
| May | 12.0 | 0.9 | |
| June | 15.9 | 1.8 | |
| July | 17.4 | 1.5 | |
| August | 18.3 | 2.6 | |
| September | 14.3 | 0.7 | |
| October | 9.1 | -1.4 | |
| November | 8.0 | 1.6 | |
| December | 4.6 | 0.1 |
Average for 2003: 10.48, anomaly: 1.01C
Daily CET graph
