Neerslag — 2020
| Month | Barendrecht | Zwijndrecht | Difference |
|---|---|---|---|
| Jan | 45.3 mm | 36.5 mm | +8.8 |
| Feb | 123.7 mm | 127 mm | -3.3 |
| Mar | 53.8 mm | 73.7 mm | -19.9 |
| Apr | 25.4 mm | 24.4 mm | +1.0 |
| May | 16.5 mm | 15.8 mm | +0.7 |
| Jun | 68.1 mm | 84.3 mm | -16.2 |
| Jul | 63.1 mm | 63.9 mm | -0.8 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |