Bewolking — 2026
| Maand | Alphen aan den Rijn | Kaag en Braassem | Verschil |
|---|---|---|---|
| Jan | 79.3 % | – | – |
| Feb | 80.7 % | – | – |
| Mrt | 54.2 % | 56.5 % | -2.3 |
| Apr | 77.6 % | 75.8 % | +1.8 |
| Mei | 59.9 % | 59.1 % | +0.8 |
| Jun | 62.1 % | 60.6 % | +1.5 |
| Jul | 53.7 % | 54.4 % | -0.7 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |