Bewolking — 2020
| Month | Aalsmeer | Haarlemmermeer | Difference |
|---|---|---|---|
| Jan | 79.1 % | 79.1 % | +0.0 |
| Feb | 73.9 % | 73.9 % | +0.0 |
| Mar | 53.2 % | 53.2 % | +0.0 |
| Apr | 39 % | 39 % | +0.0 |
| May | 45.9 % | 45.9 % | +0.0 |
| Jun | 66.1 % | 66.1 % | +0.0 |
| Jul | 62.3 % | 62.3 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |