Neerslag — 2020
| Month | Herstal | Liège | Difference |
|---|---|---|---|
| Jan | 44.1 mm | 41.4 mm | +2.7 |
| Feb | 162.6 mm | 147.3 mm | +15.3 |
| Mar | 83.7 mm | 79.7 mm | +4.0 |
| Apr | 26.1 mm | 28 mm | -1.9 |
| May | 22.4 mm | 18.2 mm | +4.2 |
| Jun | 87 mm | 82.8 mm | +4.2 |
| Jul | 53.1 mm | 53.3 mm | -0.2 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |