Bewolking — 2020
| Month | Altena | Geertruidenberg | Difference |
|---|---|---|---|
| Jan | 78.4 % | 78.4 % | +0.0 |
| Feb | 75.2 % | 75.2 % | +0.0 |
| Mar | 53 % | 53 % | +0.0 |
| Apr | 36.2 % | 36.2 % | +0.0 |
| May | 48.2 % | 48.2 % | +0.0 |
| Jun | 65.8 % | 65.8 % | +0.0 |
| Jul | 63.4 % | 63.4 % | +0.0 |
| Aug |
| – |
| – |
| – |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Dec | – | – | – |