Neerslag — 2026
| Mois | Leiden | Leiderdorp | Différence |
|---|---|---|---|
| Jan | 87.4 mm | – | – |
| Fév | 68.7 mm | – | – |
| Mar | 41.8 mm | 8.3 mm | +33.5 |
| Avr | 3.7 mm | 4.2 mm | -0.5 |
| Mai | 39.4 mm | 39.4 mm | +0.0 |
| Juin | 73 mm | 73 mm | +0.0 |
| Juil | 14.6 mm | 14.6 mm | +0.0 |
| Aoû |
| 81 mm |
| 81 mm |
| +0.0 |
| Sep | 57.1 mm | 54.6 mm | +2.5 |
| Oct | – | – | – |
| Nov | – | – | – |
| Déc | – | – | – |