Neerslag — 2020
| Month | Hardinxveld-Giessendam | Altena | Difference |
|---|---|---|---|
| Jan | 42.7 mm | 43.5 mm | -0.8 |
| Feb | 127.8 mm | 130.3 mm | -2.5 |
| Mar | 55.1 mm | 56.7 mm | -1.6 |
| Apr | 23.2 mm | 22.3 mm | +0.9 |
| May | 14.2 mm | 13.5 mm | +0.7 |
| Jun | 64.2 mm | 65.1 mm | -0.9 |
| Jul | 63.5 mm | 66.6 mm | -3.1 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |