Neerslag — 2026
| Maand | Alphen aan den Rijn | Kaag en Braassem | Verschil |
|---|---|---|---|
| Jan | 89 mm | – | – |
| Feb | 64.1 mm | – | – |
| Mrt | 64.1 mm | 6.4 mm | +57.7 |
| Apr | 4.2 mm | 4.3 mm | -0.1 |
| Mei | 64.4 mm | 52.1 mm | +12.3 |
| Jun | 84.6 mm | 86.3 mm | -1.7 |
| Jul | 5.7 mm | 6.4 mm | -0.7 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |