Bewolking — 2026
| Monat | Haarlem | Heemstede | Unterschied |
|---|---|---|---|
| Jan | 81.7 % | – | – |
| Feb | 78.3 % | – | – |
| Mär | 57.1 % | 51.8 % | +5.3 |
| Apr | 81.3 % | 78.2 % | +3.1 |
| Mai | 57.7 % | 57.7 % | +0.0 |
| Jun | 59.8 % | 59.4 % | +0.4 |
| Jul | 53.2 % | 51.3 % | +1.9 |
| Aug |
| 46.1 % |
| 41.7 % |
| +4.4 |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dez | – | – | – |