15 cities with 30-year climate records.
| City | Climate | Best time to visit |
|---|---|---|
| Antwerp | May–September | |
| Gent | May–September | |
| Liège | May–September | |
| Brugge | June–September | |
| Deurne | May–September | |
| Hasselt | May–September | |
| Kortrijk | May–September | |
| Tournai | May–September | |
| Ostend | June–September | |
| Sint-Niklaas | May–September | |
| Genk | May–September | |
| Seraing | May–September | |
| Roeselare | May–September | |
| Verviers | May–September | |
| Mouscron | May–September |