Bewolking — 2026
| Month | Heemstede | Bloemendaal | Difference |
|---|---|---|---|
| Jan | – | – | – |
| Feb | – | – | – |
| Mar | 51.8 % | 50.6 % | +1.2 |
| Apr | 78.2 % | 81.5 % | -3.3 |
| May | 57.7 % | 56.2 % | +1.5 |
| Jun | 59.4 % | 58.1 % | +1.3 |
| Jul | 49.8 % | 50.4 % | -0.6 |
| Aug |
| 52.1 % |
| 49.8 % |
| +2.3 |
| Sep | 70.1 % | 69.1 % | +1.0 |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |