| Month | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | Max | Min | Avg | Max | Min | Avg | Max | Min | Avg | Max | Min | Avg | Max | Min | Avg | Max | Min | Avg | Max | Min | |
| January | - | - | - | 6.5 | 12.7 | -2.5 | 3.3 | 12.1 | -3.9 | 4.5 | 14.3 | -4.5 | 4.7 | 12.9 | -8.2 | 4.6 | 12.5 | -6.4 | 3.3 | 12.1 | -5.8 |
| February | - | - | - | 6.7 | 13.5 | -3 | 5.2 | 16.5 | -5.6 | 7.1 | 14.6 | -2.9 | 5.9 | 14.8 | -5.9 | 8 | 16.5 | -2.6 | 4.6 | 15 | -3.8 |
| March | - | - | - | 6.6 | 16.1 | -3.2 | 7 | 23.8 | -1.9 | 7.7 | 19.1 | -3.5 | 7.1 | 15.4 | -4.3 | 8 | 17.1 | -3.5 | 7.3 | 19.1 | -4.2 |
| April | - | - | - | 10.9 | 25.1 | -2.6 | 6.6 | 17.7 | -3.4 | 9.6 | 22.2 | -2.2 | 8.6 | 20 | -3 | 9.9 | 20.9 | -0.3 | 10.8 | 25.6 | -1.1 |
| May | - | - | - | 13.6 | 27.8 | -0.6 | 10.7 | 23.6 | -0.2 | 13.8 | 26.8 | 2.7 | 12.8 | 23 | 2 | 14.2 | 25.6 | 4.6 | 18.3 | 28.5 | 6.1 |
| June | - | - | - | 16 | 30.9 | 5.7 | 16.8 | 28.6 | 5 | 16.3 | 32 | 4.5 | 18 | 31.8 | 6.3 | 15.6 | 30.5 | 4.2 | - | - | - |
| July | - | - | - | 17.1 | 36 | 6.4 | 18.1 | 32.1 | 9.4 | 20 | 39.4 | 8.6 | 17.1 | 30.1 | 7.2 | 17.5 | 31.7 | 6.5 | - | - | - |
| August | - | - | - | 18.5 | 35.2 | 5.9 | 16.3 | 24.3 | 7.7 | 19.9 | 33.6 | 8.4 | 17.1 | 27.4 | 8.3 | 18.1 | 33.4 | 7.1 | - | - | - |
| September | 14.5 | 19.1 | 9.3 | 14.6 | 29 | 3.9 | 16 | 28.3 | 5.6 | 14.5 | 25.7 | 3.2 | 17.5 | 32.1 | 8 | 14.3 | 29.5 | 1.9 | - | - | - |
| October | 10.4 | 18.1 | 0.3 | 10.6 | 17.7 | 3.9 | 11.9 | 19.3 | 4.1 | 12.7 | 20.8 | 0.8 | 12.2 | 25.2 | -1.1 | 11.3 | 20.8 | -0.9 | - | - | - |
| November | 6.1 | 14.7 | -3.7 | 8.3 | 16.4 | -1.6 | 7.2 | 14.7 | -2.3 | 9.2 | 15.7 | 0.5 | 7 | 15.1 | -4.6 | 7.3 | 16.4 | -2.2 | - | - | - |
| December | 6 | 12.4 | -2.8 | 5.1 | 13.2 | -3.2 | 6.8 | 14.7 | -3.7 | 3.6 | 12.8 | -8.6 | 7.4 | 14.2 | -2.9 | 7 | 13.5 | 0 | - | - | - |