Neerslag — 2020
| Month | Simpelveld | Heerlen | Difference |
|---|---|---|---|
| Jan | 42.8 mm | 30.8 mm | +12.0 |
| Feb | 160.9 mm | 134.3 mm | +26.6 |
| Mar | 83.6 mm | 68.3 mm | +15.3 |
| Apr | 23.8 mm | 18.9 mm | +4.9 |
| May | 25.4 mm | 16.9 mm | +8.5 |
| Jun | 78.5 mm | 59.6 mm | +18.9 |
| Jul | 55.6 mm | 46.9 mm | +8.7 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |