Neerslag — 2020
| Month | Leidschendam-Voorburg | Wassenaar | Difference |
|---|---|---|---|
| Jan | 50.7 mm | 82.7 mm | -32.0 |
| Feb | 117.9 mm | 136.9 mm | -19.0 |
| Mar | 48.1 mm | 46.1 mm | +2.0 |
| Apr | 27.7 mm | 26 mm | +1.7 |
| May | 14.3 mm | 19.7 mm | -5.4 |
| Jun | 60.4 mm | 66 mm | -5.6 |
| Jul | 58 mm | 80.5 mm | -22.5 |
| Aug | – | – | – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |