Bewolking — 2020
| Maand | Kaag en Braassem | Alphen aan den Rijn | Verschil |
|---|---|---|---|
| Jan | 79.1 % | 79.1 % | +0.0 |
| Feb | 73.9 % | 74.3 % | -0.4 |
| Mrt | 53.2 % | 53.6 % | -0.4 |
| Apr | 39 % | 38.3 % | +0.7 |
| Mei | 45.9 % | 47.4 % | -1.5 |
| Jun | 66.1 % | 66.2 % | -0.1 |
| Jul | 62.3 % | 63.1 % | -0.8 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Okt | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |