Temperatuur — 2026
| Mois | Heerlen | Landgraaf | Différence |
|---|---|---|---|
| Jan | 2.8 °C | – | – |
| Fév | 6.5 °C | – | – |
| Mar | 8.6 °C | 5.9 °C | +2.7 |
| Avr | 9.4 °C | 9 °C | +0.4 |
| Mai | 15 °C | 15 °C | +0.0 |
| Juin | 20.2 °C | 20.2 °C | +0.0 |
| Juil | 21.2 °C | 21.1 °C | +0.1 |
| Aoû |
| 22.7 °C |
| 22.3 °C |
| +0.4 |
| Sep | – | – | – |
| Oct | – | – | – |
| Nov | – | – | – |
| Déc | – | – | – |