Neerslag — 2020
| Mois | Heerlen | Simpelveld | Différence |
|---|---|---|---|
| Jan | 30.8 mm | 42.8 mm | -12.0 |
| Fév | 134.3 mm | 160.9 mm | -26.6 |
| Mar | 68.3 mm | 83.6 mm | -15.3 |
| Avr | 18.9 mm | 23.8 mm | -4.9 |
| Mai | 16.9 mm | 25.4 mm | -8.5 |
| Juin | 59.6 mm | 78.5 mm | -18.9 |
| Juil | 46.9 mm | 55.6 mm | -8.7 |
| Aoû | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Déc | – | – | – |