Bewolking — 2026
| Maand | Hillegom | Heemstede | Verschil |
|---|---|---|---|
| Jan | 80.8 % | – | – |
| Feb | 79.4 % | – | – |
| Mrt | 55 % | 51.8 % | +3.2 |
| Apr | 77.2 % | 78.2 % | -1.0 |
| Mei | 57.7 % | 57.7 % | +0.0 |
| Jun | 59.4 % | 59.4 % | +0.0 |
| Jul | 49.8 % | 49.8 % | +0.0 |
| Aug |
| 52.1 % |
| 52.1 % |
| +0.0 |
| Sep | 71.3 % | 71.3 % | +0.0 |
| Okt | 65.4 % | 66 % | -0.6 |
| Nov | – | – | – |
| Dec | – | – | – |