| yesterday (observation) | today (forecast) | tomorrow (forecast) | |
|---|---|---|---|
| Belgium | good - 3 | fairly good - 4 | fairly good - 4 |
| Flanders | good - 3 | fairly good - 4 | fairly good - 4 |
| Brussels | good - 3 | good - 3 | fairly good - 4 |
| Wallonia | good - 3 | fairly good - 4 | fairly good - 4 |