Neerslag — 2020
| Maand | Kaag en Braassem | Alphen aan den Rijn | Verschil |
|---|---|---|---|
| Jan | 62.1 mm | 47.6 mm | +14.5 |
| Feb | 132.9 mm | 127.7 mm | +5.2 |
| Mrt | 49.7 mm | 53 mm | -3.3 |
| Apr | 24.2 mm | 25.3 mm | -1.1 |
| Mei | 22.2 mm | 20.5 mm | +1.7 |
| Jun | 71.5 mm | 67.6 mm | +3.9 |
| Jul | 72.7 mm | 62.4 mm | +10.3 |
| Aug | – | – | – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |